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Shares And Stockholders' Equity (Schedule of Reclassifications Out Of AOCI) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total realized gain (loss) | $ (647) | $ (117) | $ (671) | $ (480)
Net investment income | 1,172 | 1,355 | 2,547 | 2,606
Interest and debt expense | (84) | (70) | (152) | (141)
Commissions and other expenses | $ (1,123) | $ (1,272) | (2,207) | (2,446)
Unrealized Gain (Loss) on AFS Securities [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total realized gain (loss) |  |  | (44) | (12)
Reclassifications before income tax benefit (expense) |  |  | 18 | (17)
Income tax benefit (expense) |  |  | (4) | 4
Reclassifications, net of income tax |  |  | 14 | (13)
Unrealized Gain (Loss) on AFS Securities [Member] | Associated amortization of DAC, VOBA, DSI and DFEL [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total realized gain (loss) |  |  | 62 | (5)
Unrealized OTTI on AFS Securities [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total realized gain (loss) |  |  |  | 5
Reclassifications before income tax benefit (expense) |  |  |  | 5
Income tax benefit (expense) |  |  |  | (1)
Reclassifications, net of income tax |  |  |  | 4
Unrealized Gain (Loss) on Derivative Instruments [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Nonoperating income expense |  |  | 23 | 20
Reclassifications before income tax benefit (expense) |  |  | 4 | 18
Income tax benefit (expense) |  |  | (1) | (4)
Reclassifications, net of income tax |  |  | 3 | 14
Unrealized Gain (Loss) on Derivative Instruments [Member] | Interest Rate Contracts [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Net investment income |  |  | 1 | 2
Interest and debt expense |  |  | (8) | (1)
Unrealized Gain (Loss) on Derivative Instruments [Member] | Foreign currency contracts [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total realized gain (loss) |  |  | 8 | 4
Net investment income |  |  | 22 | 15
Unrealized Gain (Loss) on Derivative Instruments [Member] | Associated amortization of DAC, VOBA, DSI and DFEL [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Commissions and other expenses |  |  | $ (19) | $ (2)

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