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	$ 3,901	$ 5,421	$ 3,215
OCI before reclassifications	(11,805)	(1,919)	3,126
Deferred income tax benefit (expense) (3)	2,478	402	(665)
AOCI before reclassifications, net of income tax	(5,426)	3,904	5,676
Amounts reclassified from AOCI	181	(5)	(323)
Deferred income tax benefit (expense) (3)	(37)	2	68
Amounts reclassified from AOCI, net of income tax	144	(3)	(255)
Balance end of period	(5,282)	3,901	5,421
Cumulative effect of change in accounting principle, net of income tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period		3
Balance end of period			3
Unrealized Investment Gains (Losses), Net of Related Offsets (1)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period	3,675	5,321	3,066
OCI before reclassifications	(12,112)	(2,090)	3,159
Deferred income tax benefit (expense) (3)	2,524	438	(663)
AOCI before reclassifications, net of income tax	(5,913)	3,669	5,562
Amounts reclassified from AOCI	202	7	(305)
Deferred income tax benefit (expense) (3)	(42)	(1)	64
Amounts reclassified from AOCI, net of income tax	160	6	(241)
Balance end of period	(5,753)	3,675	5,321
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period	233	108	163
OCI before reclassifications	329	170	(52)
Deferred income tax benefit (expense) (3)	(50)	(36)	11
AOCI before reclassifications, net of income tax	512	242	122
Amounts reclassified from AOCI	(21)	(12)	(18)
Deferred income tax benefit (expense) (3)	5	3	4
Amounts reclassified from AOCI, net of income tax	(16)	(9)	(14)
Balance end of period	496	233	108
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance beginning of period	(7)	(8)	(14)
OCI before reclassifications	(22)	1	19
Deferred income tax benefit (expense) (3)	4	0	(13)
AOCI before reclassifications, net of income tax	(25)	(7)	(8)
Amounts reclassified from AOCI	0	0	0
Deferred income tax benefit (expense) (3)	0	0	0
Amounts reclassified from AOCI, net of income tax	0	0	0
Balance end of period	$ (25)	$ (7)	$ (8)