INVESTMENTS - Fixed Maturities, Available-for-sale Securities (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		$ 8,556
Gross Unrealized Gains		301
Gross Unrealized Losses		85
Allowance for Credit Losses		1
Asset-backed securities	$ 7,665	8,771
U.S Treasury securities and obligations of U.S. government authorities and agencies
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		654
Gross Unrealized Gains		74
Gross Unrealized Losses		1
Allowance for Credit Losses		0
Asset-backed securities		727
Obligations of U.S. states and their political subdivisions
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		281
Gross Unrealized Gains		15
Gross Unrealized Losses		0
Allowance for Credit Losses		0
Asset-backed securities		296
Foreign government bonds
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		106
Gross Unrealized Gains		9
Gross Unrealized Losses		1
Allowance for Credit Losses		0
Asset-backed securities		114
U.S. corporate public securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		2,345
Gross Unrealized Gains		133
Gross Unrealized Losses		18
Allowance for Credit Losses		0
Asset-backed securities		2,460
U.S. corporate private securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		1,635
Gross Unrealized Gains		24
Gross Unrealized Losses		14
Allowance for Credit Losses		1
Asset-backed securities		1,645
Foreign corporate public securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		793
Gross Unrealized Gains		11
Gross Unrealized Losses		9
Allowance for Credit Losses		0
Asset-backed securities		795
Foreign corporate private securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		920
Gross Unrealized Gains		5
Gross Unrealized Losses		34
Allowance for Credit Losses		0
Asset-backed securities		892
Asset-backed securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		1,058
Gross Unrealized Gains		5
Gross Unrealized Losses		1
Allowance for Credit Losses		0
Asset-backed securities		1,062
Commercial mortgage-backed securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		692
Gross Unrealized Gains		22
Gross Unrealized Losses		8
Allowance for Credit Losses		0
Asset-backed securities		706
Residential mortgage-backed securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		72
Gross Unrealized Gains		3
Gross Unrealized Losses		0
Allowance for Credit Losses		0
Asset-backed securities		$ 74

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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