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	$ 70,347		$ 70,347		$ 68,636
Allowance for Credit Losses	22		22		22
Gross Unrealized Gains	87		87		4,752
Gross Unrealized Losses	10,217		10,217		290
Fair Value	60,195		60,195		73,076
Amortized Cost (Less Allowance for Credit Losses)
Due in one year or less	1,147		1,147
Due in years two through five	13,178		13,178
Due in years six through ten	17,063		17,063
Due after ten years	25,424		25,424
Subtotal	56,812		56,812
Amortized cost	70,325		70,325
Fair Value
Due in one year or less	1,130		1,130
Due in years two through five	12,415		12,415
Due in years six through ten	15,083		15,083
Due after ten years	19,173		19,173
Subtotal	47,801		47,801
Fair Value	60,195		60,195		73,076
Available For Sale Fixed Maturities Proceeds Gross Gains And Gross Losses From Sales And Other Than Temporary Impairments [Abstract]
Proceeds from sales	878	$ 3,575	11,512	$ 20,294
Gross gains on sales	0	172	38	1,017
Gross losses on sales	(73)	(6)	(663)	(160)
Net change in Allowance for Credit and Intent to Sell losses	(248)	(2)	(251)	(14)
Fixed Maturities - Credit Loss Impairments
Balances, beginning of period	32	40	42	28
Previously recognized impairments on securities that matured, paid, prepaid or sold	(2)	(2)	(15)	(3)
Recognized impairments on securities impaired to fair value this period	251	0	251	0
Credit losses recognized this period on securities for which credit losses were not previously recognized	(1)	1	0	9
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
Balances, end of period	285	$ 40	285	$ 40
Corporate
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	47,882		47,882		45,578
Allowance for Credit Losses	22		22		22
Gross Unrealized Gains	69		69		2,382
Gross Unrealized Losses	7,515		7,515		214
Fair Value	40,414		40,414		47,724
Fair Value
Fair Value	40,414		40,414		47,724
U.S. government, agencies and authorities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,238		7,238		13,032
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	4		4		2,196
Gross Unrealized Losses	1,311		1,311		14
Fair Value	5,931		5,931		15,214
Fair Value
Fair Value	5,931		5,931		15,214
States and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	600		600		527
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	8		8		73
Gross Unrealized Losses	78		78		3
Fair Value	530		530		597
Fair Value
Fair Value	530		530		597
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	494		494		82
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	1		1		8
Gross Unrealized Losses	25		25		0
Fair Value	470		470		90
Amortized Cost (Less Allowance for Credit Losses)
Without single maturity date	494		494
Fair Value
Without single maturity date	470		470
Fair Value	470		470		90
Asset-backed
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	9,235		9,235		5,904
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	1		1		20
Gross Unrealized Losses	540		540		19
Fair Value	8,696		8,696		5,905
Amortized Cost (Less Allowance for Credit Losses)
Without single maturity date	9,235		9,235
Fair Value
Without single maturity date	8,696		8,696
Fair Value	8,696		8,696		5,905
Commercial mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,743		3,743		2,348
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	0		0		19
Gross Unrealized Losses	558		558		26
Fair Value	3,185		3,185		2,341
Amortized Cost (Less Allowance for Credit Losses)
Without single maturity date	3,743		3,743
Fair Value
Without single maturity date	3,185		3,185
Fair Value	3,185		3,185		2,341
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