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	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	$ 2,683		$ 2,683		$ 2,444
Fixed maturities, allowance for credit losses	0		0		0
Fixed maturities, gross unrealized gains	0		0		139
Fixed maturities, gross unrealized losses	439		439		11
Fair Value	2,244		2,244		2,572	$ 2,420
Amortized Cost
Due in one year or less	34		34
Due in years two through five	627		627
Due in years six through ten	908		908
Due after ten years	979		979
Subtotal	2,548		2,548
Amortized Cost	2,683		2,683
Fair Value
Due in one year or less	34		34
Due in years two through five	598		598
Due in years six through ten	772		772
Due after ten years	725		725
Subtotal	2,129		2,129
Fair Value	2,244		2,244		2,572	$ 2,420
Available For Sale Fixed Maturities Proceeds Gross Gains And Gross Losses From Sales And Other Than Temporary Impairments [Abstract]
Proceeds from sales	0	$ 71	62	$ 100
Gross gains on sales	0	0	0	0
Gross losses on sales	0	(1)	4	(1)
Net change in Allowance for Credit and Intent to Sell losses	0	0	0	0
Fixed Maturities - Credit Loss Impairments
Balance, beginning of period	0	2	2	2
Previously recognized impairments on securities that matured, paid, prepaid or sold	0	0	2	0
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	0	0	0
Additional credit losses this period on securities previously impaired	0	0	0	0
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	0	$ 2	0	$ 2
Corporate
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	2,492		2,492		2,237
Fixed maturities, allowance for credit losses	0		0		0
Fixed maturities, gross unrealized gains	0		0		135
Fixed maturities, gross unrealized losses	409		409		10
Fair Value	2,083		2,083		2,362
Fair Value
Fair Value	2,083		2,083		2,362
U.S. Treasury, government and agency
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	15		15		66
Fixed maturities, allowance for credit losses	0		0		0
Fixed maturities, gross unrealized gains	0		0		1
Fixed maturities, gross unrealized losses	1		1		1
Fair Value	14		14		66
Fair Value
Fair Value	14		14		66
States and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	41		41		31
Fixed maturities, allowance for credit losses	0		0		0
Fixed maturities, gross unrealized gains	0		0		3
Fixed maturities, gross unrealized losses	9		9		0
Fair Value	32		32		34
Fair Value
Fair Value	32		32		34
Foreign governments
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	0		0
Fixed maturities, allowance for credit losses	0		0
Fixed maturities, gross unrealized gains	0		0
Fixed maturities, gross unrealized losses	0		0
Fair Value	0		0
Fair Value
Fair Value	0		0
Asset-backed
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	54		54		30
Fixed maturities, allowance for credit losses	0		0		0
Fixed maturities, gross unrealized gains	0		0		0
Fixed maturities, gross unrealized losses	4		4		0
Fair Value	50		50		30
Amortized Cost
Without single maturity date	54		54
Fair Value
Without single maturity date	50		50
Fair Value	50		50		30
Commercial mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	81		81		80
Fixed maturities, allowance for credit losses	0		0		0
Fixed maturities, gross unrealized gains	0		0		0
Fixed maturities, gross unrealized losses	16		16		0
Fair Value	65		65		80
Amortized Cost
Without single maturity date	81		81
Fair Value
Without single maturity date	65		65
Fair Value	$ 65		$ 65		$ 80