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Shares And Stockholders' Equity (Schedule of Reclassifications Out Of AOCI) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total realized gain (loss) | $ (56) | $ 37 | $ (105) | $ (121)
Net investment income | 1,239 | 1,259 | 3,738 | 3,630
Interest and debt expense | (63) | (66) | (190) | (202)
Commissions and other expenses | (1,020) | (1,283) | (3,068) | (3,236)
Income (loss) from continuing operations before taxes | 510 | 612 | 1,518 | 1,262
Federal income tax expense (benefit) | 92 | 145 | 254 | 260
Net income (loss) | $ 418 | $ 467 | 1,264 | 1,002
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gain (Loss) on AFS Securities [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total realized gain (loss) |  |  | (26) | (131)
Income (loss) from continuing operations before taxes |  |  | (42) | (145)
Federal income tax expense (benefit) |  |  | 15 | 51
Net income (loss) |  |  | (27) | (94)
Reclassification out of Accumulated Other Comprehensive Income [Member] | 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) |  |  | (16) | (14)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized OTTI on AFS Securities [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total realized gain (loss) |  |  | 6 | 1
Income (loss) from continuing operations before taxes |  |  | 5 | 1
Federal income tax expense (benefit) |  |  | (2) |
Net income (loss) |  |  | 3 | 1
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized OTTI on AFS Securities [Member] | Change In DAC, VOBA, DSI, And DFEL [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total realized gain (loss) |  |  | (1) |
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Nonoperating income expense |  |  | 7 | 12
Income (loss) from continuing operations before taxes |  |  | 6 | 11
Federal income tax expense (benefit) |  |  | (2) | (4)
Net income (loss) |  |  | 4 | 7
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member] | Interest rate contracts [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Total realized gain (loss) |  |  |  | 1
Net investment income |  |  | 3 | 4
Interest and debt expense |  |  | (13) | (6)
Reclassification out of Accumulated Other Comprehensive Income [Member] | 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) |  |  | 5 | 6
Net investment income |  |  | 12 | 7
Reclassification out of Accumulated Other Comprehensive Income [Member] | 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 |  |  | $ (1) | $ (1)

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