| **Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions** | 12 Months Ended |
|------------------------------------------------------------------------------------|-----------------|
||
| Net income                                                                         | $ 1,000         | $ 813 | $ 899 |
| **Other Comprehensive Income (Loss), net of tax**                                  |            |   |   |
| Net unrealized gains on investments                                                | 948             | (812) | 103 |
| Foreign currency translation adjustment                                            | 39              | (82) | 100 |
| Pension and postretirement benefits                                                | (58)            | 0 | 2 |
| Other comprehensive income (loss), net of tax                                      | 929             | (894) | 205 |
| Total comprehensive income (loss)                                                  | 1,929           | (81) | 1,104 |
| Net unrealized gains on investments with other-than-temporary impairments          |            |   |   |
| **Other Comprehensive Income (Loss), net of tax**                                  |            |   |   |
| Net unrealized gains on investments                                                | 1               | 14 | 5 |
| Net unrealized gains on other investments                                          |            |   |   |
| **Other Comprehensive Income (Loss), net of tax**                                  |            |   |   |
| Net unrealized gains on investments                                                | $ 949           | $ (798) | $ 108 |

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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.
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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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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities and unrealized holding gain (loss) related to transfers of securities into the available-for-sale classification and out of the held-to-maturity classification.
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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.
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Amount after tax and reclassification adjustments of other comprehensive income (loss).
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Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.
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