| **Income Taxes (Current and deferred components of the Company's income tax (expense) benefit) (Details) (USD $)In Millions, unless otherwise specified** | 12 Months Ended                               |
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| **Income Tax Expense (Benefit), Continuing Operations [Abstract]**                                                                                        |                                          |   |   |
| Current tax (expense) benefit                                                                                                                             | $ (318)us-gaap_CurrentIncomeTaxExpenseBenefit | $ (292)us-gaap_CurrentIncomeTaxExpenseBenefit | $ (94)us-gaap_CurrentIncomeTaxExpenseBenefit |
| Deferred income tax (expense) benefit                                                                                                                     | (1)us-gaap_DeferredIncomeTaxExpenseBenefit    | (69)us-gaap_DeferredIncomeTaxExpenseBenefit | (145)us-gaap_DeferredIncomeTaxExpenseBenefit |
| Income tax (expense) benefit                                                                                                                              | $ (319)us-gaap_IncomeTaxExpenseBenefit        | $ (361)us-gaap_IncomeTaxExpenseBenefit | $ (239)us-gaap_IncomeTaxExpenseBenefit |

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| - Definition
Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.
+ References
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| - Definition
Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.
+ References
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