| **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                                                                                                                             | $ (299)         | $ (97) | $ (54) |
| Deferred income tax (expense) benefit                                                                                                                     | (77)            | (147) | (188) |
| Income tax (expense) benefit                                                                                                                              | $ (376)         | $ (244) | $ (242) |

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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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