Equity (Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	$ 3,901	$ 5,421
OCI before reclassifications	(4,583)	(2,812)
Deferred income tax benefit (expense) (2)	962	591
AOCI before reclassifications, net of income tax	280	3,200
Amounts reclassified from AOCI	39	(19)
Deferred income tax benefit (expense) (2)	(8)	4
Amounts reclassified from AOCI, net of income tax	31	(15)
Balance, end of period	311	3,185
Unrealized Investment Gains (Losses), Net of Related Offsets (1)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	3,675	5,321
OCI before reclassifications	(4,595)	(2,737)
Deferred income tax benefit (expense) (2)	965	575
AOCI before reclassifications, net of income tax	45	3,159
Amounts reclassified from AOCI	41	(12)
Deferred income tax benefit (expense) (2)	(9)	3
Amounts reclassified from AOCI, net of income tax	32	(9)
Balance, end of period	77	3,150
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	233	108
OCI before reclassifications	20	(67)
Deferred income tax benefit (expense) (2)	(4)	14
AOCI before reclassifications, net of income tax	249	55
Amounts reclassified from AOCI	(2)	(7)
Deferred income tax benefit (expense) (2)	1	1
Amounts reclassified from AOCI, net of income tax	(1)	(6)
Balance, end of period	248	49
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(7)	(8)
OCI before reclassifications	(8)	(8)
Deferred income tax benefit (expense) (2)	1	2
AOCI before reclassifications, net of income tax	(14)	(14)
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	$ (14)	$ (14)