INVESTMENTS - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) issue	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) issue	Sep. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($) issue	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Net Investment Income [Line Items]
Number of unrealized loss positions | issue	4,803		4,803			1,896
Debt securities exposure in single issuer greater than stated percentage of total investments	0.70%		0.70%
Fixed maturities available-for-sale, amortized cost	$ 70,347,000,000		$ 70,347,000,000			$ 68,636,000,000
Gross unrealized losses	1,724,000,000		1,724,000,000			79,000,000
Allowance for credit loss	83,000,000	$ 64,000,000	83,000,000	$ 64,000,000		62,000,000
Separate account equity investment carrying value	33,000,000		33,000,000			44,000,000
Fixed maturities
Net Investment Income [Line Items]
Accrued investment income receivable	561,000,000		561,000,000			470,000,000
Accrued interest, writeoff	0	0	0	0
Fixed maturities available-for-sale, amortized cost	70,300,000,000		70,300,000,000			68,600,000,000
Corporate
Net Investment Income [Line Items]
Debt securities exposure in single issuer of total investments	$ 275,000,000		$ 275,000,000			$ 280,000,000
Debt securities exposure in single issuer of total investments, percent	69.10%		69.10%			3.20%
Fixed maturities available-for-sale, amortized cost	$ 47,882,000,000		$ 47,882,000,000			$ 45,578,000,000
Gross unrealized losses	1,413,000,000		1,413,000,000			62,000,000
Commercial mortgages:
Net Investment Income [Line Items]
Accrued investment income receivable	63,000,000		63,000,000			57,000,000
Accrued interest, writeoff			0	0
Allowance for credit loss	77,000,000	60,000,000	77,000,000	60,000,000	$ 58,000,000	57,000,000	$ 59,000,000	$ 77,000,000
Non-accruing loans, carrying value	13,000,000		13,000,000			14,000,000
Agricultural mortgages:
Net Investment Income [Line Items]
Accrued investment income receivable	63,000,000		63,000,000			57,000,000
Accrued interest, writeoff			0	0
Allowance for credit loss	6,000,000	$ 4,000,000	6,000,000	$ 4,000,000	$ 6,000,000	5,000,000	$ 4,000,000	$ 4,000,000
Individually Assessed Mortgage loans
Net Investment Income [Line Items]
Mortgage loans foreclosure probable	0		0
Allowance for credit loss	0		0
Recurring
Net Investment Income [Line Items]
Investment gains (losses), net	310,000,000		310,000,000			379,000,000
Other Than Investment Grade | Non-Investment Grade | Fixed maturities
Net Investment Income [Line Items]
Available-for-sale securities, amortized cost basis other than investment grade	$ 2,900,000,000		$ 2,900,000,000			$ 2,800,000,000
Percentage of available for sale securities	4.10%		4.10%			4.10%
Unrealized loss on available for sale securities	$ 241,000,000		$ 241,000,000			$ 18,000,000