| **SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Details 3) - USD ($) $ in Millions** | 12 Months Ended |
|----------------------------------------------------------------------------------------------------|-----------------|
||
| **Condensed Financial Statements, Captions [Line Items]**                                          |            |   |   |
| Net cash (used in) provided by operating activities                                                | $ 73            | $ 121 | $ (11) |
| **Cash flows from investing activities:**                                                          |            |   |   |
| Purchases of property and equipment                                                                | (17)            | (31) | (15) |
| (Increase) decrease in restricted cash                                                             | (10)            | 9 | (87) |
| Purchases of certificates of deposit                                                               | 0               | 0 | (250) |
| Proceeds from maturities of certificates of deposit                                                | 0               | 0 | 250 |
| Net cash provided by investing activities                                                          | 50              | 62 | 489 |
| **Cash flows from financing activities:**                                                          |            |   |   |
| Principal payments on unsecured borrowings                                                         | 0               | (245) | (435) |
| Cash tender premiums for convertible debt                                                          | 0               | (30) | 0 |
| Issuances of Common stock                                                                          | 0               | 2 | 10 |
| Repurchase of Common stock                                                                         | (23)            | (77) | (200) |
| Other, net                                                                                         | 0               | (4) | (3) |
| Net cash used in financing activities                                                              | (123)           | (536) | (464) |
| Net increase (decrease) in Cash and cash equivalents                                               | 0               | (353) | 14 |
| Cash and cash equivalents at beginning of period                                                   | 906             | 1,259 | 1,245 |
| Cash and cash equivalents at end of period                                                         | 906             | 906 | 1,259 |
| **Supplemental Cash Flow Information [Abstract]**                                                  |            |   |   |
| Payments for debt retirement premiums                                                              | 0               | 0 | 22 |
| Interest payments                                                                                  | 66              | 72 | 125 |
| Income tax (refunds) payments, net                                                                 | (29)            | 9 | 543 |
| Parent Company                                                                                     |            |   |   |
| **Condensed Financial Statements, Captions [Line Items]**                                          |            |   |   |
| Net cash (used in) provided by operating activities                                                | 22              | (19) | (522) |
| **Cash flows from investing activities:**                                                          |            |   |   |
| Net decrease in amounts due from subsidiaries                                                      | 47              | 10 | 0 |
| Purchases of property and equipment                                                                | (7)             | (8) | (5) |
| (Increase) decrease in restricted cash                                                             | (1)             | (1) | 1 |
| Proceeds from sale of business, net of transaction costs                                           | 0               | 0 | 1,369 |
| Purchases of certificates of deposit                                                               | 0               | 0 | (250) |
| Proceeds from maturities of certificates of deposit                                                | 0               | 0 | 250 |
| Net cash provided by investing activities                                                          | 39              | 1 | 1,365 |
| **Cash flows from financing activities:**                                                          |            |   |   |
| Net cash (used in) provided by consolidated subsidiaries                                           | 0               | 0 | (69) |
| Principal payments on unsecured borrowings                                                         | 0               | (245) | (435) |
| Cash tender premiums for convertible debt                                                          | 0               | (30) | 0 |
| Issuances of Common stock                                                                          | 0               | 2 | 10 |
| Repurchase of Common stock                                                                         | (23)            | (77) | (200) |
| Other, net                                                                                         | 0               | (2) | (3) |
| Net cash used in financing activities                                                              | (23)            | (352) | (697) |
| Net increase (decrease) in Cash and cash equivalents                                               | 38              | (370) | 146 |
| Cash and cash equivalents at beginning of period                                                   | 745             | 1,115 | 969 |
| Cash and cash equivalents at end of period                                                         | 783             | 745 | 1,115 |
| **Supplemental Cash Flow Information [Abstract]**                                                  |            |   |   |
| Payments for debt retirement premiums                                                              | 0               | 0 | 22 |
| Interest payments                                                                                  | 42              | 49 | 83 |
| Income tax (refunds) payments, net                                                                 | $ (29)          | $ 9 | $ 534 |

| X                                                                                                                                                                                                                                                                                                                                          |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The increase (decrease) in cash associated with the entity's investments in consolidated subsidiaries.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                          |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Net Increase Decrease in Amounts Due From Subsidiaries
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No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                     |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow for incremental, external costs directly pertaining to debt retirement premiums, including interest and excluding repayment of debt principal.
+ References
No definition available.
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| - Definition
The cash inflow associated with the maturity of certificate of deposit.
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No definition available.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes.
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| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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No definition available.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities.
+ References
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| - Definition
The amount of cash paid for interest during the period.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.
+ References
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No definition available.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow to reacquire common stock during the period.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                               |
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| - Definition
The cash outflow for incremental, external costs directly pertaining to an early extinguishment of debt, including legal costs and prepayment penalties, and excluding interest and repayment of debt principal.
+ References
No definition available.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow from temporary investment with specific maturity and interest rate that are prohibited for current use.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash inflow from the additional capital contribution to the entity.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.
+ References
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| - Definition
The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt.
+ References
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| - References
No definition available.
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