| **Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions**                                    | 3 Months Ended | 9 Months Ended |
|--------------------------------------------------------------------------------------------------------------------------|----------------|----------------|
||
| **Statement of Comprehensive Income [Abstract]**                                                                         |           |           |   |   |
| Net Income (Loss)                                                                                                        | $ (99)         | $ (416)        | $ 660 | $ (1,500) |
| Change in unrealized gains and losses on investments, net of benefit of $(79), $(109), $(76) and $(393), respectively    | (290)          | (405)          | (284) | (1,477) |
| Amortization of pension actuarial loss and prior service cost, net of tax (benefit) of $0, $0, $(2) and $0, respectively | 0              | 0              | (5) | 0 |
| Change in life policy reserves, reinsurance recoverable and other, net of tax of $22, $25, $19 and $104, respectively    | 89             | 95             | 76 | 393 |
| Other comprehensive loss                                                                                                 | (201)          | (310)          | (213) | (1,084) |
| Comprehensive Income (Loss)                                                                                              | $ (300)        | $ (726)        | $ 447 | $ (2,584) |

| X                                                                                                                                                                                                                                                                                                                                    |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Change in life policy reserves, reinsurance recoverable and other, net of tax
+ References
No definition available.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.
+ References
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| - Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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| - Definition
Amount, after tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.
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| - Definition
Amount, after tax and adjustment, of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.
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| - Definition
Amount after tax and reclassification adjustments of other comprehensive income (loss).
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