| **Commitments And Contingencies (Minimum Contractual Obligations) (Details) (USD $)In Millions, unless otherwise specified**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |        |        |        |        | 1 Months Ended | 9 Months Ended |     |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|--------|--------|--------|----------------|----------------|-----|
||
| **Long Term Purchase Commitments**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |   |   |   |   |           |           |     |   |   |  |   |  |   |   |   |   |
| Unrecorded Portion for 2013 (remaining three months)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               | $ 85   |   | $ 42   | $ 14   | $ 13           | $ 2            | [1] | $ 14 |   |  |   |  |   |   |   |   |
| Unrecorded Portion for 2014                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | 307    |   | 174    | 54     | 51             | 5              | [1] | 23 |   |  |   |  |   |   |   |   |
| Unrecorded Portion for 2015                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | 256    |   | 166    | 34     | 42             | 5              | [1] | 9 |   |  |   |  |   |   |   |   |
| Unrecorded Portion for 2016                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | 275    |   | 207    | 34     | 28             | 5              | [1] | 1 |   |  |   |  |   |   |   |   |
| Unrecorded Portion for 2017                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | 108    |   | 70     | 20     | 16             | 2              | [1] | 0 |   |  |   |  |   |   |   |   |
| Unrecorded Portion for 2018                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | 85     |   | 54     | 20     | 11             | 0              | [1] | 0 |   |  |   |  |   |   |   |   |
| Unrecorded Portion for Thereafter                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | 532    |   | 453    | 63     | 16             | 0              | [1] | 0 |   |  |   |  |   |   |   |   |
| Unrecorded Total                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | 1,648  |   | 1,166  | 239    | 177            | 19             | [1] | 47 |   |  |   |  |   |   |   |   |
| Recorded Portion for 2013 (remaining three months)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 | 9      |   |   |   |           |           |     |   | 0 | [1] | 9 | [2] |   |   |   |   |
| Recorded Portion for 2014                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | 28     |   |   |   |           |           |     |   | 0 | [1] | 28 | [2] |   |   |   |   |
| Recorded Portion for 2015                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | 20     |   |   |   |           |           |     |   | 0 | [1] | 20 | [2] |   |   |   |   |
| Recorded Portion for 2016                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | 5      |   |   |   |           |           |     |   | 0 | [1] | 5 | [2] |   |   |   |   |
| Recorded Portion for 2017                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | 653    |   |   |   |           |           |     |   | 633 | [1] | 20 | [2] |   |   |   |   |
| Recorded Portion for 2018                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | 1      |   |   |   |           |           |     |   | 0 | [1] | 1 | [2] |   |   |   |   |
| Recorded Portion for Thereafter                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | 1      |   |   |   |           |           |     |   | 0 | [1] | 1 | [2] |   |   |   |   |
| Recorded Total                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     | 717    |   |   |   |           |           |     |   | 633 | [1] | 84 | [2] |   |   |   |   |
| Total for 2013 (remaining three months)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | 94     |   |   |   |           |           |     |   |   |  |   |  |   |   |   |   |
| Total for 2014                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     | 335    |   |   |   |           |           |     |   |   |  |   |  |   |   |   |   |
| Total for 2015                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     | 276    |   |   |   |           |           |     |   |   |  |   |  |   |   |   |   |
| Total for 2016                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     | 280    |   |   |   |           |           |     |   |   |  |   |  |   |   |   |   |
| Total for 2017                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     | 761    |   |   |   |           |           |     |   |   |  |   |  |   |   |   |   |
| Total for 2018                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     | 86     |   |   |   |           |           |     |   |   |  |   |  |   |   |   |   |
| Total for Thereafter                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               | 533    |   |   |   |           |           |     |   |   |  |   |  |   |   |   |   |
| Total Commitments                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | 2,365  |   |   |   |           |           |     |   |   |  |   |  |   |   |   |   |
| Amount that would reduce lease commitments due to minimum sub-lease rentals for unutilized office space resulting from reorganization activities due in the future under non-cancelable sub-leases                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 | 5      |   |   |   |           |           |     |   |   |  |   |  |   |   |   |   |
| Principal amount                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | 632.5  | 632.5  |   |   |           |           |     |   |   |  |   |  | 632.5 |   |   |   |
| Debt Instrument, Unamortized Discount                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |   |   |   |   |           | 79             |     |   |   |  |   |  |   |   |   |   |
| Contractual interest rate of 0.75% Convertible Senior Notes due 2016                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               | 0.75%  | 0.75%  |   |   |           |           |     |   |   |  |   |  |   |   | 0.75% | 0.75% |
| Convertible Senior Notes due description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |   |   |   |   |           |           |     |   |   |  |   |  |   | 2016 | 2016 |   |
| Other Accrued Liabilities, Current                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 | $ 332  | $ 441  |   |   |           | $ 2            |     |   |   |  |   |  |   |   |   |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| [1]Included in the $19 million coupon interest on the 0.75% Convertible Senior Notes due 2016 is $2 million of accrued interest recognized as of December 31, 2012. We will be obligated to pay the $632.5 million principal amount of the 0.75% Convertible Senior Notes due 2016 in cash and any excess conversion value in shares of our common stock upon redemption of the Notes at maturity on July 15, 2016 or upon earlier redemption. The $632.5 million principal amount excludes $79 million of unamortized discount of the liability component. See Note 12 for additional information regarding our 0.75% Convertible Senior Notes due 2016.[2](b)See Note 8 for additional information regarding recognized commitments resulting from our restructuring plans. Lease commitments have not been reduced for approximately $5 million due in the future from third parties under non-cancelable sub-leases. |

| X                                                                                                                                                                                                                                                                                                                                                                       |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Recorded Unconditional Purchase Obligation Balance Sheet Amount Five Years After Fiscal Year End
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of the fixed and determinable portion of a recorded unconditional purchase obligation as of the balance sheet date due during the fourth twelve-month period following the current fiscal year-end date.
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No definition available.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of the fixed and determinable portion of a recorded unconditional purchase obligation as of the balance sheet date due during the first twelve-month period following the current fiscal year-end date.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of the fixed and determinable portion of a recorded unconditional purchase obligation as of the balance sheet date due during the remaining current fiscal year.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of the fixed and determinable portion of a recorded unconditional purchase obligation as of the balance sheet date due after the fourth twelve-month period following the current fiscal year-end date.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of the fixed and determinable portion of a recorded unconditional purchase obligation as of the balance sheet date due during the third twelve-month period following the current fiscal year-end date.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of the fixed and determinable portion of a recorded unconditional purchase obligation as of the balance sheet date due during the second twelve-month period following the current fiscal year-end date.
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No definition available.
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TotalUnconditionalPurchaseObligationBalanceSheetAmount
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| - Definition
Total Unconditional Purchase Obligation Balance Sheet Amount Five Years After Fiscal Year End
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| - Definition
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Total unconditional purchase obligation balance sheet amount one year after fiscal year end
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| - Definition
Total Unconditional Purchase Obligation Balance Sheet Amount Remaining For Current Fiscal Year
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| - Definition
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| - Definition
TotalUnconditionalPurchaseObligationBalanceSheetAmountThreeYearsAfterFiscalYearEnd
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| - Definition
Total Unconditional Purchase Obligation Balance Sheet Amount Two Years After Fiscal Year End
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| X                                                                                                                                                                                                                                                                                                                                                                           |
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| - Definition
Unrecorded Unconditional Purchase Obligation Balance Sheet Amount Five Years After Fiscal Year End
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of the fixed and determinable portion of an unrecorded unconditional purchase obligation as of the balance sheet date due during the fourth twelve-month period following the current fiscal year-end date.
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No definition available.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of the fixed and determinable portion of an unrecorded unconditional purchase obligation as of the balance sheet date due during the first twelve-month period following the current fiscal year-end date.
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No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of the fixed and determinable portion of an unrecorded unconditional purchase obligation as of the balance sheet date due during the remaining current fiscal year.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of the fixed and determinable portion of an unrecorded unconditional purchase obligation as of the balance sheet date due after the fourth twelve-month period following the current fiscal year-end date.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of the fixed and determinable portion of an unrecorded unconditional purchase obligation as of the balance sheet date due during the third twelve-month period following the current fiscal year-end date.
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No definition available.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of the fixed and determinable portion of an unrecorded unconditional purchase obligation as of the balance sheet date due during the second twelve-month period following the current fiscal year-end date.
+ References
No definition available.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Interest rate stated in the contractual debt agreement.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Contractually required future rental payments receivable on noncancelable subleasing arrangements.
+ References
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Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).
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Amount of the recorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).
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Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).
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