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General - Statement of Comprehensive Income (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Net income | $ 851 | $ 717 | $ 2,143 | $ 1,723
Unrealized net capital gains and losses | 682 | (133) | 1,656 | (698)
Unrealized foreign currency translation adjustments | 4 | (6) | 9 | (8)
Change in unamortized pension and other postretirement prior service credit | (11) | (16) | (23) | (30)
Other comprehensive income (loss), after-tax | 675 | (155) | 1,642 | (736)
Comprehensive income | 1,526 | 562 | 3,785 | 987
Previously reported |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Net income | 920 | 676 | 2,207 | 1,651
Unrealized net capital gains and losses | 682 | (133) | 1,656 | (698)
Unrealized foreign currency translation adjustments | 7 | (7) | 14 | (11)
Change in unamortized pension and other postretirement prior service credit | 125 | 22 | 135 | 45
Other comprehensive income (loss), after-tax | 814 | (118) | 1,805 | (664)
Comprehensive income | 1,734 | 558 | 4,012 | 987
Impact of change | Impact of change |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Net income | (69) | 41 | (64) | 72
Unrealized net capital gains and losses | 0 | 0 | 0 | 0
Unrealized foreign currency translation adjustments | (3) | 1 | (5) | 3
Change in unamortized pension and other postretirement prior service credit | (136) | (38) | (158) | (75)
Other comprehensive income (loss), after-tax | (139) | (37) | (163) | (72)
Comprehensive income | $ (208) | $ 4 | $ (227) | $ 0

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