INVESTMENTS - Net Unrealized Investment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 540	$ 715	$ 708	$ 786
Ending balance	391	673	391	673
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Unrealized Investment Gains Losses All Other | Net Unrealized Gains (Losses) on Investments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(93)	107	128	248
Net investment gains (losses) arising during the period	(202)	64	(424)	(74)
Included in net income (loss)	2		3
Excluded from net income (loss)				0
Other			0	(3)
Impact of net unrealized investment gains (losses)	0		0	0
Net unrealized investment gains (losses) excluding credit losses	(293)	171	(293)	171
Net unrealized investment gains (losses) with credit losses	0	0	0	0
Ending balance	(293)	171	(293)	171
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Unrealized Investment Gains Losses All Other | DAC
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	40	(52)	(46)	(111)
Impact of net unrealized investment gains (losses)	79	(30)	165	29
Net unrealized investment gains (losses) excluding credit losses	119	(82)	119	(82)
Ending balance	119	(82)	119	(82)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Unrealized Investment Gains Losses All Other | Policyholders’ Liabilities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(26)	26	28	37
Impact of net unrealized investment gains (losses)	(54)	13	(108)	2
Net unrealized investment gains (losses) excluding credit losses	(80)	39	(80)	39
Ending balance	(80)	39	(80)	39
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Unrealized Investment Gains Losses All Other | Deferred Income Tax Asset (Liability)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	16	(18)	(24)	(38)
Impact of net unrealized investment gains (losses)	37	(9)	77	11
Net unrealized investment gains (losses) excluding credit losses	53	(27)	53	(27)
Ending balance	53	(27)	53	(27)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Unrealized Investment Gains Losses All Other | AOCI Gain (Loss) Related to Net Unrealized Investment Gains (Losses)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(63)	63	86	136
Net investment gains (losses) arising during the period	(202)	64	(424)	(74)
Included in net income (loss)	2		3
Excluded from net income (loss)				0
Other			0	(3)
Impact of net unrealized investment gains (losses)	62	(26)	134	42
Net unrealized investment gains (losses) excluding credit losses	(201)	101	(201)	101
Net unrealized investment gains (losses) with credit losses	0	0	0	0
Ending balance	(201)	101	(201)	101
Fixed maturities | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Unrealized Investment Gains Losses All Other | DAC
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Net unrealized investment gains (losses) with credit losses	0	0	0	0
Fixed maturities | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Unrealized Investment Gains Losses All Other | 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	0
Fixed maturities | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Unrealized Investment Gains Losses All Other | 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	$ 0