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Shares And Stockholders' Equity (Schedule of Reclassifications Out Of AOCI) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Total realized gain (loss) | $ (24) | $ (362)
Net investment income | 1,375 | 1,251
Interest and debt expense | (68) | (71)
Commissions and other expenses | (1,085) | (1,176)
Unrealized Gain (Loss) on AFS Securities [Member] |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Total realized gain (loss) | (2) | (15)
Reclassifications before income tax benefit (expense) | 30 | (16)
Income tax benefit (expense) | (6) | 3
Reclassifications, net of income tax | 24 | (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) | 32 | (1)
Unrealized Gain (Loss) on Derivative Instruments [Member] |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Nonoperating income expense | 9 | 8
Reclassifications before income tax benefit (expense) | 3 | 7
Income tax benefit (expense) | (1) | (1)
Reclassifications, net of income tax | 2 | 6
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
Interest and debt expense | (3) | (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) | 1 | 1
Net investment income | 11 | 7
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 | $ (6) | $ (1)

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