INVESTMENTS - Net Unrealized Investment (Details) - AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent - Unrealized Investment Gains Losses All Other - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net Unrealized Gains (Losses) on Investments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 248	$ 101	$ (57)
Net investment gains (losses) arising during the period	(114)	148	158
Included in net income (loss)	(4)	(1)	0
Other (1)	(2)
Impact of net unrealized investment gains (losses)	0	0	0
Net unrealized investment gains (losses) excluding credit losses	128	248	101
Net unrealized investment gains (losses) with credit losses	0	0	0
Ending balance	128	248	101
DAC
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(111)	(53)	48
Impact of net unrealized investment gains (losses)	65	(58)	(101)
Net unrealized investment gains (losses) excluding credit losses	(46)	(111)	(53)
Ending balance	(46)	(111)	(53)
Policyholders’ Liabilities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	37	12	(6)
Impact of net unrealized investment gains (losses)	(9)	25	18
Net unrealized investment gains (losses) excluding credit losses	28	37	12
Ending balance	28	37	12
Deferred Income Tax Asset (Liability)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(36)	(12)	3
Impact of net unrealized investment gains (losses)	12	(24)	(15)
Net unrealized investment gains (losses) excluding credit losses	(24)	(36)	(12)
Ending balance	(24)	(36)	(12)
AOCI Gain (Loss) Related to Net Unrealized Investment Gains (Losses)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	138	48	(12)
Net investment gains (losses) arising during the period	(114)	148	158
Included in net income (loss)	(4)	(1)	0
Other (1)	(2)
Impact of net unrealized investment gains (losses)	68	(57)	(98)
Net unrealized investment gains (losses) excluding credit losses	86	138	48
Net unrealized investment gains (losses) with credit losses	0	0	0
Ending balance	86	138	48
Fixed maturities | DAC
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Net unrealized investment gains (losses) with credit losses	0	0	0
Fixed maturities | Policyholders’ Liabilities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Net unrealized investment gains (losses) with credit losses	0	0	0
Fixed maturities | Deferred Income Tax Asset (Liability)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Net unrealized investment gains (losses) with credit losses	$ 0	$ 0	$ 0