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Investments - Consolidated Investments (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Available-for-sale securities
Amortized Cost	$ 30,705	$ 25,577
Allowance for Expected Credit Losses	(8)	(19)	$ 0
Gross Unrealized Gains	1,518	2,068
Gross Unrealized Losses	(225)	(39)
FairValue/Carrying Value	31,990	27,587
Asset-backed securities
Available-for-sale securities
Amortized Cost	8,516	5,941
Allowance for Expected Credit Losses	(3)	0	0
Gross Unrealized Gains	220	343
Gross Unrealized Losses	(38)	(18)
FairValue/Carrying Value	8,695	6,266
Commercial mortgage-backed securities
Available-for-sale securities
Amortized Cost	2,684	2,490
Allowance for Expected Credit Losses	(2)	0
Gross Unrealized Gains	308	342
Gross Unrealized Losses	(11)	(3)
FairValue/Carrying Value	2,979	2,829
Corporates
Available-for-sale securities
Amortized Cost	15,822	13,582
Allowance for Expected Credit Losses	0	(16)	0
Gross Unrealized Gains	830	1,184
Gross Unrealized Losses	(158)	(15)
FairValue/Carrying Value	16,494	14,735
Hybrids
Available-for-sale securities
Amortized Cost	838	914
Allowance for Expected Credit Losses	0	0	0
Gross Unrealized Gains	74	80
Gross Unrealized Losses	0	0
FairValue/Carrying Value	912	994
Municipals
Available-for-sale securities
Amortized Cost	1,445	1,333
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	67	72
Gross Unrealized Losses	(11)	(2)
FairValue/Carrying Value	1,501	1,403
Residential mortgage-backed securities
Available-for-sale securities
Amortized Cost	731	806
Allowance for Expected Credit Losses	(3)	(3)	$ 0
Gross Unrealized Gains	7	23
Gross Unrealized Losses	(4)	(1)
FairValue/Carrying Value	731	825
U.S. Government
Available-for-sale securities
Amortized Cost	393	332
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	3	10
Gross Unrealized Losses	(2)	0
FairValue/Carrying Value	394	342
Foreign Governments
Available-for-sale securities
Amortized Cost	276	179
Allowance for Expected Credit Losses	0	0
Gross Unrealized Gains	9	14
Gross Unrealized Losses	(1)	0
FairValue/Carrying Value	$ 284	$ 193

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