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SCHEDULE II - CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Statements of Comprehensive Income (Loss)) (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
Revenues |  |  |  |  |  |  |  |  |  |  |  |
Net investment income |  |  |  |  |  |  |  |  |  | $ 4,990 | $ 4,874 | $ 4,827
Other revenues |  |  |  |  |  |  |  |  |  | 539 | 491 | 531
Total revenues |  | $ 3,669 | $ 3,511 | $ 3,577 | $ 3,500 | $ 3,255 | $ 3,525 | $ 3,307 | $ 3,243 | 14,257 | 13,330 | 13,572
Expenses |  |  |  |  |  |  |  |  |  |  |  |
Operating and administrative expenses |  |  |  |  |  |  |  |  |  | 1,766 | 1,687 | 1,701
Total expenses |  | 4,057 | 3,001 | 3,044 | 3,025 | 3,058 | 2,913 | 2,893 | 3,008 | 13,127 | 11,872 | 12,142
Income (loss) before federal income taxes, equity in income (loss) of subsidiaries, less dividends |  |  |  |  |  |  |  |  |  | 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
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Unrealized investment gains (losses) |  |  |  |  |  |  |  |  |  | 1,643 | 709 | (2,229)
Foreign currency translation adjustment |  |  |  |  |  |  |  |  |  | 13 | (22) | (2)
Funded status of employee benefit plans |  |  |  |  |  |  |  |  |  | (8) | (34) | 20
Total other comprehensive income (loss), net of tax |  |  |  |  |  |  |  |  |  | 1,664 | 721 | (2,251)
Comprehensive income (loss) |  |  |  |  |  |  |  |  |  | 3,743 | 1,913 | (1,097)
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |
Dividends from subsidiaries | [2] |  |  |  |  |  |  |  |  | 1,069 | 1,035 | 1,175
Interest from subsidiaries | [2] |  |  |  |  |  |  |  |  | 133 | 123 | 111
Net investment income |  |  |  |  |  |  |  |  |  | 2 | 3 |
Realized gain (loss) |  |  |  |  |  |  |  |  |  | (3) |  |
Other revenues |  |  |  |  |  |  |  |  |  |  |  | 25
Total revenues |  |  |  |  |  |  |  |  |  | 1,201 | 1,161 | 1,311
Expenses |  |  |  |  |  |  |  |  |  |  |  |
Operating and administrative expenses |  |  |  |  |  |  |  |  |  | 40 | 46 | 38
Interest - subsidiaries | [2] |  |  |  |  |  |  |  |  | 21 | 16 | 7
Interest - other |  |  |  |  |  |  |  |  |  | 247 | 327 | 270
Total expenses |  |  |  |  |  |  |  |  |  | 308 | 389 | 315
Income (loss) before federal income taxes, equity in income (loss) of subsidiaries, less dividends |  |  |  |  |  |  |  |  |  | 893 | 772 | 996
Federal income tax expense (benefit) |  |  |  |  |  |  |  |  |  | (20) | (95) | (66)
Income (loss) before equity in income (loss) of subsidiaries, less dividends |  |  |  |  |  |  |  |  |  | 913 | 867 | 1,062
Equity in income (loss) of subsidiaries, less dividends | [2] |  |  |  |  |  |  |  |  | 1,166 | 325 | 92
Net income (loss) |  |  |  |  |  |  |  |  |  | 2,079 | 1,192 | 1,154
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Unrealized investment gains (losses) |  |  |  |  |  |  |  |  |  | 1,643 | 709 | (2,229)
Foreign currency translation adjustment |  |  |  |  |  |  |  |  |  | 13 | (22) | (2)
Funded status of employee benefit plans |  |  |  |  |  |  |  |  |  | 8 | 34 | (20)
Total other comprehensive income (loss), net of tax |  |  |  |  |  |  |  |  |  | 1,664 | 721 | (2,251)
Comprehensive income (loss) |  |  |  |  |  |  |  |  |  | $ 3,743 | $ 1,913 | $ (1,097)
[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
[2] | Eliminated in consolidation.

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