Equity (Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	$ (5,114)	$ (5,931)
OCI before reclassifications	(214)	934
Deferred income tax benefit (expense) (2)	45	(196)
AOCI before reclassifications, net of income tax	(5,283)	(5,193)
Amounts reclassified from AOCI	30	69
Deferred income tax benefit (expense) (2)	(6)	(14)
Amounts reclassified from AOCI, net of income tax	24	55
Balance, end of period	(5,259)	(5,138)
Unrealized Investment  Gains (Losses), Net of Related  Offsets (1)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(4,214)	(6,041)
OCI before reclassifications	(786)	1,367
Deferred income tax benefit (expense) (2)	165	(287)
AOCI before reclassifications, net of income tax	(4,835)	(4,961)
Amounts reclassified from AOCI	33	69
Deferred income tax benefit (expense) (2)	(7)	(14)
Amounts reclassified from AOCI, net of income tax	26	55
Balance, end of period	(4,809)	(4,906)
Unrealized Gains (Losses) on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	272	496
OCI before reclassifications	52	(40)
Deferred income tax benefit (expense) (2)	(11)	8
AOCI before reclassifications, net of income tax	313	464
Amounts reclassified from AOCI	(3)	0
Deferred income tax benefit (expense) (2)	1	0
Amounts reclassified from AOCI, net of income tax	(2)	0
Balance, end of period	311	464
Changes in Nonperformance Risk on Market Risk Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(1,880)	(1,377)
OCI before reclassifications	215	(7)
Deferred income tax benefit (expense) (2)	(45)	2
AOCI before reclassifications, net of income tax	(1,710)	(1,382)
Amounts reclassified from AOCI	0	0
Deferred income tax benefit (expense) (2)	0	0
Amounts reclassified from AOCI, net of income tax	0	0
Balance, end of period	(1,710)	(1,382)
Changes in Discount Rates on the Liability for Future Policy Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	719	1,016
OCI before reclassifications	313	(394)
Deferred income tax benefit (expense) (2)	(66)	83
AOCI before reclassifications, net of income tax	966	705
Amounts reclassified from AOCI	0	0
Deferred income tax benefit (expense) (2)	0	0
Amounts reclassified from AOCI, net of income tax	0	0
Balance, end of period	966	705
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(11)	(25)
OCI before reclassifications	(8)	8
Deferred income tax benefit (expense) (2)	2	(2)
AOCI before reclassifications, net of income tax	(17)	(19)
Amounts reclassified from AOCI	0	0
Deferred income tax benefit (expense) (2)	0	0
Amounts reclassified from AOCI, net of income tax	0	0
Balance, end of period	$ (17)	$ (19)