Equity (Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 6,148	$ 5,941
OCI before reclassifications	731	(214)
Deferred income tax benefit (expense) (2)	(153)	45
AOCI before reclassifications, net of income tax	(4,585)	(5,283)
Amounts reclassified from AOCI	21	30
Deferred income tax benefit (expense) (2)	(5)	(6)
Amounts reclassified from AOCI, net of income tax	16	24
Ending Balance	6,555	5,231
Unrealized Investment Gains (Losses), Net of Related Offsets (1)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(5,046)	(4,214)
OCI before reclassifications	913	(786)
Deferred income tax benefit (expense) (2)	(191)	165
AOCI before reclassifications, net of income tax	(4,324)	(4,835)
Amounts reclassified from AOCI	28	33
Deferred income tax benefit (expense) (2)	(6)	(7)
Amounts reclassified from AOCI, net of income tax	22	26
Ending Balance	(4,302)	(4,809)
Unrealized Gains (Losses) on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	364	272
OCI before reclassifications	(16)	52
Deferred income tax benefit (expense) (2)	3	(11)
AOCI before reclassifications, net of income tax	351	313
Amounts reclassified from AOCI	(7)	(3)
Deferred income tax benefit (expense) (2)	1	1
Amounts reclassified from AOCI, net of income tax	(6)	(2)
Ending Balance	345	311
Changes in Nonperformance Risk on Market Risk Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,602)	(1,880)
OCI before reclassifications	(27)	215
Deferred income tax benefit (expense) (2)	6	(45)
AOCI before reclassifications, net of income tax	(1,623)	(1,710)
Amounts reclassified from AOCI	0	0
Deferred income tax benefit (expense) (2)	0	0
Amounts reclassified from AOCI, net of income tax	0	0
Ending Balance	(1,623)	(1,710)
Changes in Discount Rates on the Liability for Future Policy Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	1,146	719
OCI before reclassifications	(155)	313
Deferred income tax benefit (expense) (2)	32	(66)
AOCI before reclassifications, net of income tax	1,023	966
Amounts reclassified from AOCI	0	0
Deferred income tax benefit (expense) (2)	0	0
Amounts reclassified from AOCI, net of income tax	0	0
Ending Balance	1,023	966
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(25)	(11)
OCI before reclassifications	16	(8)
Deferred income tax benefit (expense) (2)	(3)	2
AOCI before reclassifications, net of income tax	(12)	(17)
Amounts reclassified from AOCI	0	0
Deferred income tax benefit (expense) (2)	0	0
Amounts reclassified from AOCI, net of income tax	0	0
Ending Balance	(12)	(17)
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(5,163)	(5,114)
Ending Balance	$ (4,569)	$ (5,259)