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Equity (Balance of and Changes in Each Component of AOCI) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward] |  |  |  |
Balance, beginning of year |  | $ (1,871) | $ (500) | $ (909)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax |  | 1,566 | (1,871) | 690
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  | 241 | (229) | 212
Other Comprehensive Income (Loss), Tax |  | 305 | (271) | 69
Balance, end of year |  | (369) | (1,871) | (500)
Accumulated Translation Adjustment [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward] |  |  |  |
Balance, beginning of year |  | (115) | (13) | (69)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax |  | 206 | (67) | 79
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  | 0 | 0 | 0
Other Comprehensive Income (Loss), Tax |  | 22 | (35) | 23
Balance, end of year |  | 69 | (115) | (13)
Accumulated Net Unrealized Investment Gain (Loss) [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward] |  |  |  |
Balance, beginning of year | [1] | (5,497) | 3,779 | 5,612
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax | [1] | 2,037 | (12,045) | (2,144)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | [1] | 241 | 227 | (219)
Other Comprehensive Income (Loss), Tax | [1] | (449) | (2,542) | (530)
Balance, end of year | [1] | (3,668) | (5,497) | 3,779
Accumulated Defined Benefit Plans Adjustment [Member] |  |  |  |
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward] |  |  |  |
Balance, beginning of year |  | (27) | (50) | (72)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax |  | (4) | 28 | 22
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  | 0 | 2 | 7
Other Comprehensive Income (Loss), Tax |  | (2) | 7 | 7
Balance, end of year |  | (29) | (27) | (50)
AOCI, Liability for Future Policy Benefit, Parent |  |  |  |
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward] |  |  |  |
Balance, beginning of year |  | 3,755 | (4,209) | (6,416)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax |  | (660) | 10,188 | 2,787
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  | 0 | 0 | 0
Other Comprehensive Income (Loss), Tax |  | 161 | (2,224) | (580)
Balance, end of year |  | 3,256 | 3,755 | (4,209)
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, Parent |  |  |  |
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward] |  |  |  |
Balance, beginning of year |  | 13 | (7) | 36
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax |  | (13) | 25 | (54)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |  | 0 | 0 | 0
Other Comprehensive Income (Loss), Tax |  | (3) | 5 | (11)
Balance, end of year |  | $ 3 | $ 13 | $ (7)
[1] | Includes cash flow hedges of $(218), $(205) and $(22) as of December 31, 2023, 2022 and 2021, respectively. See Note 12 for additional information on cash flow hedges.

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