INVESTMENTS - Net Unrealized Gains (Losses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 8,706	$ 11,643
Ending balance	5,582	6,907
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	4,462	8,230
Net investment gains (losses) arising during the period	(6,065)	(4,891)
Included in Net income (loss)	331	(176)
Excluded from net income (loss)	0	0
Other	0	(31)
Impact of net unrealized investment gains (losses)	0	0
Net unrealized investment gains (losses) excluding OTTI losses	(1,272)	3,132
Net unrealized investment gains (losses) with OTTI losses	(5)	(8)
Ending balance	(1,277)	3,124
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	(284)	(466)
Impact of net unrealized investment gains (losses)	527	164
Net unrealized investment gains (losses) excluding OTTI losses	243	(302)
Ending balance	244	(301)
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	(977)	(1,814)
Impact of net unrealized investment gains (losses)	765	1,001
Net unrealized investment gains (losses) excluding OTTI losses	(212)	(813)
Ending balance	(213)	(811)
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	(673)	(1,250)
Impact of net unrealized investment gains (losses)	934	826
Net unrealized investment gains (losses) excluding OTTI losses	261	(424)
Ending balance	262	(423)
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	2,528	4,700
Net investment gains (losses) arising during the period	(6,065)	(4,891)
Included in Net income (loss)	331	(176)
Excluded from net income (loss)	0	0
Other	0	(31)
Impact of net unrealized investment gains (losses)	2,226	1,991
Net unrealized investment gains (losses) excluding OTTI losses	(980)	1,593
Net unrealized investment gains (losses) with OTTI losses	(4)	(4)
Ending balance	(984)	1,589
Fixed maturities, AFS | 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 OTTI losses	1	1
Fixed maturities, AFS | 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 OTTI losses	(1)	2
Fixed maturities, AFS | 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 OTTI losses	$ 1	$ 1