FAIR VALUE OF ASSETS AND LIABILITIES - Gains and Losses Resulting from Changes in Fair Value (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended		9 Months Ended
	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021
Equity securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)			$ 0			$ 1
Unrealized gains (losses) for assets still held			0			1
Insurance Liabilities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)	$ 4,953			$ 7,307
Realized investment gains (losses), net | Equity securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)			0			0
Unrealized gains (losses) for assets still held			0			0
Total Accumulated Other Comprehensive Income (Loss) | Equity securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)			0			0
Unrealized gains (losses) for assets still held			0			0
Net investment income | Equity securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)			0			0
Fixed maturity securities | Fixed maturities, trading
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)			0			0
Unrealized gains (losses) for assets still held			0			0
Fixed maturity securities | Realized investment gains (losses), net | Fixed Maturity, Available-For Sale
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		$ 0	0			(3)
Unrealized gains (losses) for assets still held		0	(2)			(5)
Fixed maturity securities | Realized investment gains (losses), net | Fixed maturities, trading
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)			0			0
Unrealized gains (losses) for assets still held			0			0
Fixed maturity securities | Total Accumulated Other Comprehensive Income (Loss) | Fixed Maturity, Available-For Sale
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		(12)	(6)			(3)
Unrealized gains (losses) for assets still held		(12)	(3)			(2)
Fixed maturity securities | Total Accumulated Other Comprehensive Income (Loss) | Fixed maturities, trading
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)			0			0
Unrealized gains (losses) for assets still held			0			0
Fixed maturity securities | Net investment income | Fixed Maturity, Available-For Sale
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		0	0			0
Fixed maturity securities | Net investment income | Fixed maturities, trading
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)			0			0
Net modified coinsurance receivable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)	(145)	0	0		$ 65	0
Unrealized gains (losses) for assets still held	0	0	0		0	0
Net modified coinsurance receivable | Realized investment gains (losses), net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)			0			0
Unrealized gains (losses) for assets still held			0			0
Net modified coinsurance receivable | Total Accumulated Other Comprehensive Income (Loss)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)			0			0
Unrealized gains (losses) for assets still held			0			0
Net modified coinsurance receivable | Net investment income
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)			0			0
Cash equivalents
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		0	0			0
Unrealized gains (losses) for assets still held		0	0			0
Cash equivalents | Realized investment gains (losses), net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)			0			0
Unrealized gains (losses) for assets still held			0			0
Cash equivalents | Total Accumulated Other Comprehensive Income (Loss)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)			0			0
Unrealized gains (losses) for assets still held			0			0
Cash equivalents | Net investment income
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)			0			0
Other assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		(21)	1			14
Unrealized gains (losses) for assets still held		(6)	0			8
Other assets | Realized investment gains (losses), net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		(21)	1			14
Unrealized gains (losses) for assets still held		(6)	0			8
Other assets | Total Accumulated Other Comprehensive Income (Loss)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		0	0			0
Unrealized gains (losses) for assets still held		0	0			0
Other assets | Net investment income
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		0	0			0
Reinsurance recoverables
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)	(158)	201	(4)		(124)	(120)
Unrealized gains (losses) for assets still held	0	222	(1)		$ 0	(106)
Reinsurance recoverables | Realized investment gains (losses), net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		201	(4)			(120)
Unrealized gains (losses) for assets still held		222	(1)			(106)
Reinsurance recoverables | Total Accumulated Other Comprehensive Income (Loss)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		0	0			0
Unrealized gains (losses) for assets still held		0	0			0
Reinsurance recoverables | Net investment income
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		0	0			0
Future policy benefits
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		715	8,380			13,746
Unrealized gains (losses) for liabilities still held		686	14			1,281
Future policy benefits | Realized investment gains (losses), net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		715	8,380			13,746
Unrealized gains (losses) for liabilities still held		686	14			1,281
Future policy benefits | Total Accumulated Other Comprehensive Income (Loss)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		0	0			0
Unrealized gains (losses) for liabilities still held		0	0			0
Future policy benefits | Net investment income
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		0	0			0
Policyholders' account balances
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		124	(8)			(516)
Unrealized gains (losses) for liabilities still held		89	543			79
Policyholders' account balances | Realized investment gains (losses), net
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		124	(8)			(516)
Unrealized gains (losses) for liabilities still held		89	543			79
Policyholders' account balances | Total Accumulated Other Comprehensive Income (Loss)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		0	0			0
Unrealized gains (losses) for liabilities still held		0	0			0
Policyholders' account balances | Net investment income
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)		$ 0	$ 0			$ 0
Reinsurance recoverables
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)	(158)			(19)
Net Modified Coinsurance Receivable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)	(145)			2
Deposit asset
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total realized and unrealized gains (losses)	$ (1,299)			$ (1,748)