Equity (Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period	$ 10,919	$ 18,072	$ 13,052
OCI before reclassifications	(51,451)	(9,272)	7,602
Deferred income tax benefit (expense)	11,338	1,837	(1,664)
AOCI before reclassifications, net of income tax	(29,194)	10,637	18,990
Amounts reclassified from AOCI	2,198	216	(1,287)
Deferred income tax benefit (expense)	(463)	(27)	421
Amounts reclassified from AOCI, net of income tax	1,735	189	(866)
Balance end of period	(27,083)	10,919	18,072
Unrealized Investment Gains (Losses), Net of Related Offsets
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period	16,042	22,217	18,283
OCI before reclassifications	(49,427)	(7,829)	5,775
Deferred income tax benefit (expense)	11,304	1,918	(1,349)
AOCI before reclassifications, net of income tax	(22,081)	16,306	22,709
Amounts reclassified from AOCI	1,607	(125)	(357)
Deferred income tax benefit (expense)	(368)	29	83
Amounts reclassified from AOCI, net of income tax	1,239	(96)	(274)
Balance end of period	(20,851)	16,042	22,217
Unrealized Gains (Losses) on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period	1,629	1,513	1,698
OCI before reclassifications	(583)	(113)	730
Deferred income tax benefit (expense)	89	18	(257)
AOCI before reclassifications, net of income tax	1,135	1,418	2,171
Amounts reclassified from AOCI	498	250	(1,016)
Deferred income tax benefit (expense)	(76)	(39)	358
Amounts reclassified from AOCI, net of income tax	422	211	(658)
Balance end of period	1,557	1,629	1,513
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period	(5,154)	(3,795)	(4,927)
OCI before reclassifications	(1,629)	(1,567)	1,002
Deferred income tax benefit (expense)	(16)	(53)	(36)
AOCI before reclassifications, net of income tax	(6,799)	(5,415)	(3,961)
Amounts reclassified from AOCI	0	0	0
Deferred income tax benefit (expense)	0	0	0
Amounts reclassified from AOCI, net of income tax	0	0	0
Balance end of period	(6,412)	(5,154)	(3,795)
Defined Benefit Plans Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period	(1,598)	(1,863)	(2,002)
OCI before reclassifications	188	237	95
Deferred income tax benefit (expense)	(39)	(46)	(22)
AOCI before reclassifications, net of income tax	(1,449)	(1,672)	(1,929)
Amounts reclassified from AOCI	93	91	86
Deferred income tax benefit (expense)	(19)	(17)	(20)
Amounts reclassified from AOCI, net of income tax	74	74	66
Balance end of period	(1,377)	(1,598)	(1,863)
Disposal Group, Held-for-Sale or Disposed of by Sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from AOCI, net of income tax	376	93	(52)
Disposal Group, Held-for-Sale or Disposed of by Sale | Unrealized Investment Gains (Losses), Net of Related Offsets
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from AOCI, net of income tax	(9)	(168)	(218)
Disposal Group, Held-for-Sale or Disposed of by Sale | Unrealized Gains (Losses) on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from AOCI, net of income tax	0	0	0
Disposal Group, Held-for-Sale or Disposed of by Sale | Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from AOCI, net of income tax	387	261	166
Disposal Group, Held-for-Sale or Disposed of by Sale | Defined Benefit Plans Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from AOCI, net of income tax	$ (2)	$ 0	$ 0