INVESTMENTS - Available-for-sale Securities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 69,340		$ 69,340		$ 68,636
Allowance for Credit Losses	19		19		22
Gross Unrealized Gains	238		238		4,752
Gross Unrealized Losses	6,885		6,885		290
Fair Value	62,674		62,674		73,076
Amortized Cost (Less Allowance for Credit Losses)
Due in one year or less	1,071		1,071
Due in years two through five	12,955		12,955
Due in years six through ten	16,795		16,795
Due after ten years	25,624		25,624
Subtotal	56,445		56,445
Amortized cost	69,321		69,321
Fair Value
Due in one year or less	1,065		1,065
Due in years two through five	12,537		12,537
Due in years six through ten	15,442		15,442
Due after ten years	21,529		21,529
Subtotal	50,573		50,573
Fair Value	62,674		62,674		73,076
Available For Sale Fixed Maturities Proceeds Gross Gains And Gross Losses From Sales And Other Than Temporary Impairments [Abstract]
Proceeds from sales	3,298	$ 9,531	10,634	$ 16,719
Gross gains on sales	9	554	38	845
Gross losses on sales	(229)	(38)	(590)	(154)
Net change in Allowance for Credit losses	2	(6)	3	(12)
Fixed Maturities - Credit Loss Impairments
Balances, beginning of period	41	34	42	28
Previously recognized impairments on securities that matured, paid, prepaid or sold	(11)	(1)	(13)	(1)
Recognized impairments on securities impaired to fair value this period	0	0	0	0
Credit losses recognized this period on securities for which credit losses were not previously recognized	1	6	1	8
Additional credit losses this period on securities previously impaired	1	1	2	5
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	32	$ 40	32	$ 40
Corporate
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	47,317		47,317		45,578
Allowance for Credit Losses	19		19		22
Gross Unrealized Gains	162		162		2,382
Gross Unrealized Losses	5,313		5,313		214
Fair Value	42,147		42,147		47,724
Fair Value
Fair Value	42,147		42,147		47,724
U.S. government, agencies and authorities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,431		7,431		13,032
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	36		36		2,196
Gross Unrealized Losses	593		593		14
Fair Value	6,874		6,874		15,214
Fair Value
Fair Value	6,874		6,874		15,214
States and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	622		622		527
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	24		24		73
Gross Unrealized Losses	53		53		3
Fair Value	593		593		597
Fair Value
Fair Value	593		593		597
Foreign governments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,094		1,094		1,124
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	5		5		42
Gross Unrealized Losses	140		140		14
Fair Value	959		959		1,152
Fair Value
Fair Value	959		959		1,152
Residential mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	508		508		82
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	3		3		8
Gross Unrealized Losses	8		8		0
Fair Value	503		503		90
Amortized Cost (Less Allowance for Credit Losses)
Without single maturity date	508		508
Fair Value
Without single maturity date	503		503
Fair Value	503		503		90
Asset-backed
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	8,681		8,681		5,904
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	4		4		20
Gross Unrealized Losses	403		403		19
Fair Value	8,282		8,282		5,905
Amortized Cost (Less Allowance for Credit Losses)
Without single maturity date	8,681		8,681
Fair Value
Without single maturity date	8,282		8,282
Fair Value	8,282		8,282		5,905
Commercial mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,647		3,647		2,348
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	0		0		19
Gross Unrealized Losses	375		375		26
Fair Value	3,272		3,272		2,341
Amortized Cost (Less Allowance for Credit Losses)
Without single maturity date	3,647		3,647
Fair Value
Without single maturity date	3,272		3,272
Fair Value	3,272		3,272		2,341
Redeemable preferred stock
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	40		40		41
Allowance for Credit Losses	0		0		0
Gross Unrealized Gains	4		4		12
Gross Unrealized Losses	0		0		0
Fair Value	44		44		53
Amortized Cost (Less Allowance for Credit Losses)
Without single maturity date	40		40
Fair Value
Without single maturity date	44		44
Fair Value	$ 44		$ 44		$ 53