INVESTMENTS - Available-for-sale Securities (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	$ 2,444	$ 2,197
Fixed maturities, allowance for credit losses	0	0
Fixed maturities, gross unrealized gains	139	250
Fixed maturities, gross unrealized losses	11	2
Fixed maturities available for sale, at fair value	2,572	2,445
Amortized Cost
Due in one year or less, Amortized Cost	44
Due in years two through five, Amortized Cost	572
Due in years six through ten, Amortized Cost	860
Due after ten years, Amortized Cost	858
Subtotal, Amortized Cost	2,334
Amortized Cost	2,444
Fair Value
Due in one year or less	44
Due in years two through five	604
Due in years six through ten	907
Due after ten years	907
Subtotal	2,462
Fair value	2,572	2,445
Available For Sale Fixed Maturities Proceeds Gross Gains And Gross Losses From Sales And Other Than Temporary Impairments [Abstract]
Proceeds from sales	302	153	$ 101
Gross gains on sales	8	5	1
Gross losses on sales	(4)	(4)	(1)
Credit losses	0	0	0
Fixed Maturities - Credit Loss Impairments
Balance, beginning of period	2	2	5
Previously recognized impairments on securities that matured, paid, prepaid or sold	0	0	3
Recognized impairments on securities impaired to fair value this period	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
Increases due to passage of time on previously recorded credit losses	0	0	0
Accretion of previously recognized impairments due to increases in expected cash flows (for OTTI securities 2019 and prior)	0	0	0
Balance, end of period	2	2	$ 2
Corporate
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	2,237	2,082
Fixed maturities, allowance for credit losses	0	0
Fixed maturities, gross unrealized gains	135	242
Fixed maturities, gross unrealized losses	10	2
Fixed maturities available for sale, at fair value	2,362	2,322
Fair Value
Fair value	2,362	2,322
U.S. government, agencies and authorities
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	66	61
Fixed maturities, allowance for credit losses	0	0
Fixed maturities, gross unrealized gains	1	2
Fixed maturities, gross unrealized losses	1	0
Fixed maturities available for sale, at fair value	66	63
Fair Value
Fair value	66	63
States and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	31	27
Fixed maturities, allowance for credit losses	0	0
Fixed maturities, gross unrealized gains	3	3
Fixed maturities, gross unrealized losses	0	0
Fixed maturities available for sale, at fair value	34	30
Fair Value
Fair value	34	30
Asset-backed
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	30	4
Fixed maturities, allowance for credit losses	0	0
Fixed maturities, gross unrealized gains	0	1
Fixed maturities, gross unrealized losses	0	0
Fixed maturities available for sale, at fair value	30	5
Amortized Cost
Maturity, without single maturity date, Amortized cost	30
Fair Value
Without single maturity date	30
Fair value	30	5
Commercial mortgage-backed
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	80	0
Fixed maturities, allowance for credit losses	0	0
Fixed maturities, gross unrealized gains	0	0
Fixed maturities, gross unrealized losses	0	0
Fixed maturities available for sale, at fair value	80	0
Amortized Cost
Maturity, without single maturity date, Amortized cost	80
Fair Value
Without single maturity date	80
Fair value	80	0
Redeemable preferred stock
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	0	23
Fixed maturities, allowance for credit losses	0	0
Fixed maturities, gross unrealized gains	0	2
Fixed maturities, gross unrealized losses	0	0
Fixed maturities available for sale, at fair value	0	25
Fair Value
Fair value	$ 0	$ 25

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 8A
-URI http://asc.fasb.org/extlink&oid=124260329&loc=SL6284422-111562

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- Definition

Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26853-111562

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 11
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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