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Shares And Stockholders' Equity (Schedule of Reclassifications Out Of AOCI) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | [1] | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | [1] | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total realized gain (loss) |  |  |  |  |  |  |  |  | $ (170) | $ (339) | $ (151)
Net investment income |  |  |  |  |  |  |  |  | 4,990 | 4,874 | 4,827
Interest and debt expense |  |  |  |  |  |  |  |  | (253) | (331) | (272)
Commissions and other expenses |  |  |  |  |  |  |  |  | (4,176) | (4,277) | (4,318)
Income (loss) from continuing operations before taxes |  |  |  |  |  |  |  |  | 1,130 | 1,458 | 1,430
Federal income tax expense (benefit) |  |  |  |  |  |  |  |  | (949) | 266 | 276
Net income (loss) | $ 816 | $ 418 | $ 411 | $ 435 | $ 189 | $ 467 | $ 325 | $ 211 | 2,079 | 1,192 | 1,154
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) |  |  |  |  |  |  |  |  | (39) | (158) | 145
Income (loss) from continuing operations before taxes |  |  |  |  |  |  |  |  | (59) | (181) | 118
Federal income tax expense (benefit) |  |  |  |  |  |  |  |  | 21 | 63 | (41)
Net income (loss) |  |  |  |  |  |  |  |  | (38) | (118) | 77
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) |  |  |  |  |  |  |  |  | (20) | (23) | (27)
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) |  |  |  |  |  |  |  |  | 5 | 3 | 2
Income (loss) from continuing operations before taxes |  |  |  |  |  |  |  |  | 4 | 3 | 2
Federal income tax expense (benefit) |  |  |  |  |  |  |  |  | (1) |  |
Net income (loss) |  |  |  |  |  |  |  |  | 3 | 3 | 2
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] |  |  |  |  |  |  |  |  |  |  |
Total gross reclassifications |  |  |  |  |  |  |  |  | 13 | 14 | (183)
Income (loss) from continuing operations before taxes |  |  |  |  |  |  |  |  | 12 | 13 | (182)
Federal income tax expense (benefit) |  |  |  |  |  |  |  |  | (4) | (5) | 64
Net income (loss) |  |  |  |  |  |  |  |  | 8 | 8 | (118)
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 |  |  |  |  |  |  |  |  | 4 | 5 | (190)
Interest and debt expense |  |  |  |  |  |  |  |  | 18 | 10 | (1)
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) |  |  |  |  |  |  |  |  | 9 | 7 |
Net investment income |  |  |  |  |  |  |  |  | 18 | 11 | 6
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 | $ (1)
[1] | Fourth quarter 2017 results include a goodwill impairment charge and the impacts of remeasuring our existing deferred tax balances for the impact of the Tax Act as disclosed elsewhere herein

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