INVESTMENTS - Available-for-sale Securities (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 75,320		$ 75,320		$ 73,429
Allowance for Credit Losses	22		22		22
Gross Unrealized Gains	87		87		5,125
Gross Unrealized Losses	10,785		10,785		316
Fair Value	64,600		64,600		78,216
Amortized Cost (Less Allowance for Credit Losses)
Due in one year or less	1,419		1,419
Due in years two through five	14,893		14,893
Due in years six through ten	18,743		18,743
Due after ten years	26,589		26,589
Subtotal	61,644		61,644
Amortized cost	75,298		75,298
Fair Value
Due in one year or less	1,397		1,397
Due in years two through five	14,033		14,033
Due in years six through ten	16,531		16,531
Due after ten years	20,125		20,125
Subtotal	52,086		52,086
Fair Value	64,600		64,600		78,216
Fixed Maturities Proceeds Gross Gains And Gross Losses From Sales And Other Than Temporary Impairments
Proceeds from sales	905	$ 3,701	11,640	$ 20,776
Gross gains on sales	0	171	44	1,019
Gross losses on sales	(62)	(8)	(653)	(162)
Net change in Allowance for Credit and Intent to Sell losses	(243)	(2)	(246)	(14)
Fixed Maturities - Credit Loss Impairments
Balance, beginning of period	32	42	44	32
Previously recognized impairments on securities that matured, paid, prepaid or sold	(2)	(1)	(17)	(4)
Recognized impairments on securities impaired to fair value this period	246	0	246	0
Credit losses recognized this period on securities for which credit losses were not previously recognized	(1)	0	0	8
Additional credit losses this period on securities previously impaired	5	1	7	6
Increases due to passage of time on previously recorded credit losses	0	0	0	0
Accretion of previously recognized impairments due to increases in expected cash flows (for OTTI securities 2019 and prior)	0	0	0	0
Balance, end of period	280	$ 42	280	$ 42
Corporate
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	52,643		52,643		50,172
Allowance for Credit Losses	22		22		22
Gross Unrealized Gains	69		69		2,601
Gross Unrealized Losses	8,144		8,144		240
Fair Value	44,546		44,546		52,511
Fair Value
Fair Value	44,546		44,546		52,511
U.S. government, agencies and authorities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,241		7,241		13,056
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	4		4		2,344
Gross Unrealized Losses	1,215		1,215		15
Fair Value	6,030		6,030		15,385
Fair Value
Fair Value	6,030		6,030		15,385
States and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	668		668		586
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	8		8		78
Gross Unrealized Losses	92		92		2
Fair Value	584		584		662
Fair Value
Fair Value	584		584		662
Foreign governments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,114		1,114		1,124
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	2		2		42
Gross Unrealized Losses	190		190		14
Fair Value	926		926		1,152
Fair Value
Fair Value	926		926		1,152
Residential mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	500		500		90
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	1		1		8
Gross Unrealized Losses	25		25		0
Fair Value	476		476		98
Amortized Cost (Less Allowance for Credit Losses)
Without single maturity date	500		500
Fair Value
Without single maturity date	476		476
Fair Value	476		476		98
Asset-backed
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	9,289		9,289		5,933
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	1		1		21
Gross Unrealized Losses	545		545		20
Fair Value	8,745		8,745		5,934
Amortized Cost (Less Allowance for Credit Losses)
Without single maturity date	9,289		9,289
Fair Value
Without single maturity date	8,745		8,745
Fair Value	8,745		8,745		5,934
Commercial mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,824		3,824		2,427
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	0		0		19
Gross Unrealized Losses	574		574		25
Fair Value	3,250		3,250		2,421
Amortized Cost (Less Allowance for Credit Losses)
Without single maturity date	3,824		3,824
Fair Value
Without single maturity date	3,250		3,250
Fair Value	3,250		3,250		2,421
Redeemable preferred stock
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	41		41		41
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	2		2		12
Gross Unrealized Losses	0		0		0
Fair Value	43		43		53
Amortized Cost (Less Allowance for Credit Losses)
Without single maturity date	41		41
Fair Value
Without single maturity date	43		43
Fair Value	$ 43		$ 43		$ 53

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Amount of other-than-temporary impairment (OTTI) on investment in debt security, recognized in earnings.

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