| **Fair Value Measurements (Financial Assets and Liabilities Measured at Fair Value On a Recurring Basis) (Details) (USD $)In Millions, unless otherwise specified** | Mar. 31, 2013 | Mar. 31, 2012 |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------|---------------|
| U.S. government and agency obligations [Member]                                                                                                                     |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Transfers from Level 2 to Level 1                                                                                                                                   | $ 53          |          |
| Transfers from Level 1 to Level 2                                                                                                                                   |          | 27            |
| Recurring [Member]                                                                                                                                                  |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Cash equivalents                                                                                                                                                    | 4,251         | 4,879         |
| Available-for-sale securities                                                                                                                                       | 5,397         | 4,659         |
| Derivative assets                                                                                                                                                   | 58            | 70            |
| Embedded derivative assets                                                                                                                                          | 0             | 0             |
| Total assets                                                                                                                                                        | 9,706         | 9,608         |
| Derivative liabilities                                                                                                                                              | (5)           | (43)          |
| Embedded derivative liabilities                                                                                                                                     | (12)          | (24)          |
| Total liabilities                                                                                                                                                   | (17)          | (67)          |
| Total net assets                                                                                                                                                    | 9,689         | 9,541         |
| Recurring [Member] | Foreign currency swaps [Member]                                                                                                                |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Derivative assets                                                                                                                                                   | 1,139         | 2,221         |
| Derivative liabilities                                                                                                                                              | (131)         | (73)          |
| Recurring [Member] | Interest rate cap [Member]                                                                                                                     |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Derivative liabilities                                                                                                                                              | 0             | 0             |
| Recurring [Member] | Interest rate swap [Member]                                                                                                                    |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Derivative assets                                                                                                                                                   | 580           | 439           |
| Derivative liabilities                                                                                                                                              | (766)         | (1,008)       |
| Recurring [Member] | Debt instruments [Member] | U.S. government and agency obligations [Member]                                                                    |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 104           | 108           |
| Recurring [Member] | Debt instruments [Member] | Municipal debt securities [Member]                                                                                 |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 16            | 20            |
| Recurring [Member] | Debt instruments [Member] | Certificates Of Deposit [Member]                                                                                   |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 2,041         | 1,341         |
| Recurring [Member] | Debt instruments [Member] | Commercial paper [Member]                                                                                          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 495           | 633           |
| Recurring [Member] | Debt instruments [Member] | Foreign government debt securities [Member]                                                                        |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 3             | 3             |
| Recurring [Member] | Debt instruments [Member] | Corporate debt securities [Member]                                                                                 |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 128           | 107           |
| Recurring [Member] | Debt instruments [Member] | U.S. government agency mortgage-backed securities [Member]                                                         |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 87            | 105           |
| Recurring [Member] | Debt instruments [Member] | Non-agency residential mortgage-backed securities [Member]                                                         |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 5             | 8             |
| Recurring [Member] | Debt instruments [Member] | Non-agency commercial mortgage-backed securities [Member]                                                          |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 51            | 26            |
| Recurring [Member] | Debt instruments [Member] | Asset-backed securities [Member]                                                                                   |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 13            | 13            |
| Recurring [Member] | Equity instruments [Member] | Fixed income short-term sector fund [Member]                                                                     |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 43            | 40            |
| Recurring [Member] | Equity instruments [Member] | Fixed income U.S. government sector fund [Member]                                                                |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 312           | 313           |
| Recurring [Member] | Equity instruments [Member] | Fixed income municipal sector fund [Member]                                                                      |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 22            | 21            |
| Recurring [Member] | Equity instruments [Member] | Fixed income investement grade corporate sector fund [Member]                                                    |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 327           | 298           |
| Recurring [Member] | Equity instruments [Member] | Fixed income high-yield sector fund [Member]                                                                     |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 42            | 37            |
| Recurring [Member] | Equity instruments [Member] | Fixed income real return sector fund [Member]                                                                    |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 293           | 231           |
| Recurring [Member] | Equity instruments [Member] | Fixed income mortgage sector fund [Member]                                                                       |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 648           | 639           |
| Recurring [Member] | Equity instruments [Member] | Fixed income asset-backed securities sector fund [Member]                                                        |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 47            | 41            |
| Recurring [Member] | Equity instruments [Member] | Fixed income emerging market sector fund [Member]                                                                |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 66            | 62            |
| Recurring [Member] | Equity instruments [Member] | Fixed income international sector fund [Member]                                                                  |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 170           | 162           |
| Recurring [Member] | Equity instruments [Member] | Equity mutual fund - S&P 500 index [Member]                                                                  |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 484           | 451           |
| Recurring [Member] | Money market instruments [Member]                                                                                                              |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Cash equivalents                                                                                                                                                    | 1,508         | 2,847         |
| Recurring [Member] | Certificates of deposit [Member]                                                                                                               |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Cash equivalents                                                                                                                                                    | 1,945         | 495           |
| Recurring [Member] | Commercial paper [Member]                                                                                                                      |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Cash equivalents                                                                                                                                                    | 798           | 1,537         |
| Recurring [Member] | Level 1 [Member]                                                                                                                               |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Cash equivalents                                                                                                                                                    | 900           | 2,591         |
| Available-for-sale securities                                                                                                                                       | 526           | 451           |
| Derivative assets                                                                                                                                                   | 0             | 0             |
| Embedded derivative assets                                                                                                                                          | 0             | 0             |
| Total assets                                                                                                                                                        | 1,426         | 3,042         |
| Derivative liabilities                                                                                                                                              | 0             | 0             |
| Embedded derivative liabilities                                                                                                                                     | 0             | 0             |
| Total liabilities                                                                                                                                                   | 0             | 0             |
| Total net assets                                                                                                                                                    | 1,426         | 3,042         |
| Recurring [Member] | Level 1 [Member] | Foreign currency swaps [Member]                                                                                             |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Derivative assets                                                                                                                                                   | 0             | 0             |
| Derivative liabilities                                                                                                                                              | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Interest rate cap [Member]                                                                                                  |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Derivative liabilities                                                                                                                                              | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Interest rate swap [Member]                                                                                                 |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Derivative assets                                                                                                                                                   | 0             | 0             |
| Derivative liabilities                                                                                                                                              | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Debt instruments [Member] | U.S. government and agency obligations [Member]                                                 |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 42            | 0             |
| Recurring [Member] | Level 1 [Member] | Debt instruments [Member] | Municipal debt securities [Member]                                                              |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Debt instruments [Member] | Certificates Of Deposit [Member]                                                                |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Debt instruments [Member] | Commercial paper [Member]                                                                       |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Debt instruments [Member] | Foreign government debt securities [Member]                                                     |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Debt instruments [Member] | Corporate debt securities [Member]                                                              |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Debt instruments [Member] | U.S. government agency mortgage-backed securities [Member]                                      |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Debt instruments [Member] | Non-agency residential mortgage-backed securities [Member]                                      |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Debt instruments [Member] | Non-agency commercial mortgage-backed securities [Member]                                       |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Debt instruments [Member] | Asset-backed securities [Member]                                                                |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Equity instruments [Member] | Fixed income short-term sector fund [Member]                                                  |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Equity instruments [Member] | Fixed income U.S. government sector fund [Member]                                             |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Equity instruments [Member] | Fixed income municipal sector fund [Member]                                                   |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Equity instruments [Member] | Fixed income investement grade corporate sector fund [Member]                                 |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Equity instruments [Member] | Fixed income high-yield sector fund [Member]                                                  |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Equity instruments [Member] | Fixed income real return sector fund [Member]                                                 |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Equity instruments [Member] | Fixed income mortgage sector fund [Member]                                                    |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Equity instruments [Member] | Fixed income asset-backed securities sector fund [Member]                                     |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Equity instruments [Member] | Fixed income emerging market sector fund [Member]                                             |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Equity instruments [Member] | Fixed income international sector fund [Member]                                               |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Equity instruments [Member] | Equity mutual fund - S&P 500 index [Member]                                               |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 484           | 451           |
| Recurring [Member] | Level 1 [Member] | Money market instruments [Member]                                                                                           |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Cash equivalents                                                                                                                                                    | 900           | 2,591         |
| Recurring [Member] | Level 1 [Member] | Certificates of deposit [Member]                                                                                            |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Cash equivalents                                                                                                                                                    | 0             | 0             |
| Recurring [Member] | Level 1 [Member] | Commercial paper [Member]                                                                                                   |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Cash equivalents                                                                                                                                                    | 0             | 0             |
| Recurring [Member] | Level 2 [Member]                                                                                                                               |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Cash equivalents                                                                                                                                                    | 3,351         | 2,288         |
| Available-for-sale securities                                                                                                                                       | 4,798         | 4,187         |
| Derivative assets                                                                                                                                                   | 1,644         | 2,568         |
| Embedded derivative assets                                                                                                                                          | 0             | 0             |
| Total assets                                                                                                                                                        | 9,793         | 9,043         |
| Derivative liabilities                                                                                                                                              | (889)         | (1,071)       |
| Embedded derivative liabilities                                                                                                                                     | 0             | 0             |
| Total liabilities                                                                                                                                                   | (889)         | (1,071)       |
| Total net assets                                                                                                                                                    | 8,904         | 7,972         |
| Recurring [Member] | Level 2 [Member] | Foreign currency swaps [Member]                                                                                             |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Derivative assets                                                                                                                                                   | 1,076         | 2,142         |
| Derivative liabilities                                                                                                                                              | (123)         | (63)          |
| Recurring [Member] | Level 2 [Member] | Interest rate cap [Member]                                                                                                  |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Derivative liabilities                                                                                                                                              | 0             | 0             |
| Recurring [Member] | Level 2 [Member] | Interest rate swap [Member]                                                                                                 |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Derivative assets                                                                                                                                                   | 568           | 426           |
| Derivative liabilities                                                                                                                                              | (766)         | (1,008)       |
| Recurring [Member] | Level 2 [Member] | Debt instruments [Member] | U.S. government and agency obligations [Member]                                                 |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 62            | 108           |
| Recurring [Member] | Level 2 [Member] | Debt instruments [Member] | Municipal debt securities [Member]                                                              |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 16            | 20            |
| Recurring [Member] | Level 2 [Member] | Debt instruments [Member] | Certificates Of Deposit [Member]                                                                |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 2,041         | 1,341         |
| Recurring [Member] | Level 2 [Member] | Debt instruments [Member] | Commercial paper [Member]                                                                       |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 495           | 633           |
| Recurring [Member] | Level 2 [Member] | Debt instruments [Member] | Foreign government debt securities [Member]                                                     |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 3             | 3             |
| Recurring [Member] | Level 2 [Member] | Debt instruments [Member] | Corporate debt securities [Member]                                                              |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 124           | 106           |
| Recurring [Member] | Level 2 [Member] | Debt instruments [Member] | U.S. government agency mortgage-backed securities [Member]                                      |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 87            | 105           |
| Recurring [Member] | Level 2 [Member] | Debt instruments [Member] | Non-agency residential mortgage-backed securities [Member]                                      |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 4             |
| Recurring [Member] | Level 2 [Member] | Debt instruments [Member] | Non-agency commercial mortgage-backed securities [Member]                                       |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 11            |
| Recurring [Member] | Level 2 [Member] | Debt instruments [Member] | Asset-backed securities [Member]                                                                |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 12            |
| Recurring [Member] | Level 2 [Member] | Equity instruments [Member] | Fixed income short-term sector fund [Member]                                                  |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 43            | 40            |
| Recurring [Member] | Level 2 [Member] | Equity instruments [Member] | Fixed income U.S. government sector fund [Member]                                             |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 312           | 313           |
| Recurring [Member] | Level 2 [Member] | Equity instruments [Member] | Fixed income municipal sector fund [Member]                                                   |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 22            | 21            |
| Recurring [Member] | Level 2 [Member] | Equity instruments [Member] | Fixed income investement grade corporate sector fund [Member]                                 |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 327           | 298           |
| Recurring [Member] | Level 2 [Member] | Equity instruments [Member] | Fixed income high-yield sector fund [Member]                                                  |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 42            | 37            |
| Recurring [Member] | Level 2 [Member] | Equity instruments [Member] | Fixed income real return sector fund [Member]                                                 |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 293           | 231           |
| Recurring [Member] | Level 2 [Member] | Equity instruments [Member] | Fixed income mortgage sector fund [Member]                                                    |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 648           | 639           |
| Recurring [Member] | Level 2 [Member] | Equity instruments [Member] | Fixed income asset-backed securities sector fund [Member]                                     |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 47            | 41            |
| Recurring [Member] | Level 2 [Member] | Equity instruments [Member] | Fixed income emerging market sector fund [Member]                                             |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 66            | 62            |
| Recurring [Member] | Level 2 [Member] | Equity instruments [Member] | Fixed income international sector fund [Member]                                               |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 170           | 162           |
| Recurring [Member] | Level 2 [Member] | Equity instruments [Member] | Equity mutual fund - S&P 500 index [Member]                                               |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 2 [Member] | Money market instruments [Member]                                                                                           |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Cash equivalents                                                                                                                                                    | 608           | 256           |
| Recurring [Member] | Level 2 [Member] | Certificates of deposit [Member]                                                                                            |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Cash equivalents                                                                                                                                                    | 1,945         | 495           |
| Recurring [Member] | Level 2 [Member] | Commercial paper [Member]                                                                                                   |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Cash equivalents                                                                                                                                                    | 798           | 1,537         |
| Recurring [Member] | Level 3 [Member]                                                                                                                               |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Cash equivalents                                                                                                                                                    | 0             | 0             |
| Available-for-sale securities                                                                                                                                       | 73            | 21            |
| Derivative assets                                                                                                                                                   | 75            | 92            |
| Embedded derivative assets                                                                                                                                          | 0             | 0             |
| Total assets                                                                                                                                                        | 148           | 113           |
| Derivative liabilities                                                                                                                                              | (8)           | (10)          |
| Embedded derivative liabilities                                                                                                                                     | (12)          | (24)          |
| Total liabilities                                                                                                                                                   | (20)          | (34)          |
| Total net assets                                                                                                                                                    | 128           | 79            |
| Recurring [Member] | Level 3 [Member] | Foreign currency swaps [Member]                                                                                             |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Derivative assets                                                                                                                                                   | 63            | 79            |
| Derivative liabilities                                                                                                                                              | (8)           | (10)          |
| Recurring [Member] | Level 3 [Member] | Interest rate cap [Member]                                                                                                  |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Derivative liabilities                                                                                                                                              | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Interest rate swap [Member]                                                                                                 |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Derivative assets                                                                                                                                                   | 12            | 13            |
| Derivative liabilities                                                                                                                                              | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Debt instruments [Member] | U.S. government and agency obligations [Member]                                                 |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Debt instruments [Member] | Municipal debt securities [Member]                                                              |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Debt instruments [Member] | Certificates Of Deposit [Member]                                                                |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Debt instruments [Member] | Commercial paper [Member]                                                                       |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Debt instruments [Member] | Foreign government debt securities [Member]                                                     |          |          |
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| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Debt instruments [Member] | Corporate debt securities [Member]                                                              |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 4             | 1             |
| Recurring [Member] | Level 3 [Member] | Debt instruments [Member] | U.S. government agency mortgage-backed securities [Member]                                      |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Debt instruments [Member] | Non-agency residential mortgage-backed securities [Member]                                      |          |          |
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| Available-for-sale securities                                                                                                                                       | 5             | 4             |
| Recurring [Member] | Level 3 [Member] | Debt instruments [Member] | Non-agency commercial mortgage-backed securities [Member]                                       |          |          |
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| Available-for-sale securities                                                                                                                                       | 51            | 15            |
| Recurring [Member] | Level 3 [Member] | Debt instruments [Member] | Asset-backed securities [Member]                                                                |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 13            | 1             |
| Recurring [Member] | Level 3 [Member] | Equity instruments [Member] | Fixed income short-term sector fund [Member]                                                  |          |          |
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| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Equity instruments [Member] | Fixed income U.S. government sector fund [Member]                                             |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Equity instruments [Member] | Fixed income municipal sector fund [Member]                                                   |          |          |
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| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Equity instruments [Member] | Fixed income investement grade corporate sector fund [Member]                                 |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Equity instruments [Member] | Fixed income high-yield sector fund [Member]                                                  |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Equity instruments [Member] | Fixed income real return sector fund [Member]                                                 |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Equity instruments [Member] | Fixed income mortgage sector fund [Member]                                                    |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Equity instruments [Member] | Fixed income asset-backed securities sector fund [Member]                                     |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Equity instruments [Member] | Fixed income emerging market sector fund [Member]                                             |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Equity instruments [Member] | Fixed income international sector fund [Member]                                               |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Equity instruments [Member] | Equity mutual fund - S&P 500 index [Member]                                               |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Available-for-sale securities                                                                                                                                       | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Money market instruments [Member]                                                                                           |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Cash equivalents                                                                                                                                                    | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Certificates of deposit [Member]                                                                                            |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Cash equivalents                                                                                                                                                    | 0             | 0             |
| Recurring [Member] | Level 3 [Member] | Commercial paper [Member]                                                                                                   |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Cash equivalents                                                                                                                                                    | 0             | 0             |
| Recurring [Member] | Counterparty Netting & Collateral [Member]                                                                                                 |          |          |
| **Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]**                                                                    |          |          |
| Derivative assets                                                                                                                                                   | (1,661)       | (2,590)       |
| Total assets                                                                                                                                                        | (1,661)       | (2,590)       |
| Derivative liabilities                                                                                                                                              | 892           | 1,038         |
| Total liabilities                                                                                                                                                   | 892           | 1,038         |
| Total net assets                                                                                                                                                    | $ (769)       | $ (1,552)     |

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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the aggregate of the assets and the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.
+ References
No definition available.
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| - Definition
This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Company may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as an asset.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44B -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 12-16, 44A, 44B -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44A -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44A, 44B -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
+ Details**Name:**us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**instant |
| X                                                                                                                                                                                                                 |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of transfers of liabilities measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258
+ Details**Name:**us-gaap_FairValueLiabilitiesLevel1ToLevel2TransfersAmount**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of transfers of liabilities measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258
+ Details**Name:**us-gaap_FairValueLiabilitiesLevel2ToLevel1TransfersAmount**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the aggregate of the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258
+ Details**Name:**us-gaap_LiabilitiesFairValueDisclosure**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**instant |