INVESTMENTS - Net Unrealized Gains (Losses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward]
Beginning balance	$ (2,039)	$ 1,228	$ (1,641)	$ (1,074)
Net unrealized investment gains (losses)	(396)	(577)	(837)	930
Ending balance	(2,451)	48	(2,451)	48
Unrealized gains (losses) on investments
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward]
Beginning balance			(6,363)
Ending balance	(7,165)		(7,165)
Unrealized gains (losses) on investments | Unrealized Investment Gains Losses, All Other | Net Unrealized Gains (Losses) on Investments
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward]
Beginning balance	(7,274)	(7,609)	(6,715)	(9,116)
Net investment gains (losses) arising during the period	(499)	(629)	(1,080)	815
Included in net income (loss)	4	50	30	120
Excluded from net income (loss)	0	0
Other	0	0	0	0
Impact of net unrealized investment gains (losses)	0	0	0	0
Ending balance	(7,768)	(8,187)	(7,768)	(8,187)
Unrealized gains (losses) on investments | Unrealized Investment Gains Losses, All Other | Policyholders’ Liabilities
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward]
Beginning balance	17	18	13	21
Net investment gains (losses) arising during the period	0	0	0	0
Included in net income (loss)	0	0	0	0
Excluded from net income (loss)	0	0
Other	0	0	0	0
Impact of net unrealized investment gains (losses)	2	(7)	6	(10)
Ending balance	19	11	19	11
Unrealized gains (losses) on investments | Unrealized Investment Gains Losses, All Other | Deferred Income Tax Asset (Liability)
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward]
Beginning balance	344	422	227	421
Net investment gains (losses) arising during the period	0	0	0	0
Included in net income (loss)	0	0	0	0
Excluded from net income (loss)	0	0
Other	(5)	(122)	(5)	195
Impact of net unrealized investment gains (losses)	103	123	219	(194)
Ending balance	442	423	442	423
Unrealized gains (losses) on investments | Unrealized Investment Gains Losses, All Other | AOCI Gain (Loss) Related to Net Unrealized Investment Gains Losses
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward]
Beginning balance	(6,913)	(7,169)	(6,475)	(8,674)
Net investment gains (losses) arising during the period	(499)	(629)	(1,080)	815
Included in net income (loss)	4	50	30	120
Excluded from net income (loss)	0	0
Other	(5)	(122)	(5)	195
Impact of net unrealized investment gains (losses)	105	116	225	(204)
Ending balance	(7,307)	(7,753)	(7,307)	(7,753)
Unrealized gains (losses) on investments | Net unrealized investment gains (losses) excluding credit losses | Net Unrealized Gains (Losses) on Investments
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward]
Net unrealized investment gains (losses)	(7,769)	(8,188)	(7,765)	(8,181)
Unrealized gains (losses) on investments | Net unrealized investment gains (losses) excluding credit losses | Policyholders’ Liabilities
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward]
Net unrealized investment gains (losses)	19	11	19	11
Unrealized gains (losses) on investments | Net unrealized investment gains (losses) excluding credit losses | Deferred Income Tax Asset (Liability)
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward]
Net unrealized investment gains (losses)	442	423	441	422
Unrealized gains (losses) on investments | Net unrealized investment gains (losses) excluding credit losses | AOCI Gain (Loss) Related to Net Unrealized Investment Gains Losses
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward]
Net unrealized investment gains (losses)	(7,308)	(7,754)	(7,305)	(7,748)
Unrealized gains (losses) on investments | Net unrealized investment gains (losses) with credit losses | Net Unrealized Gains (Losses) on Investments
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward]
Net unrealized investment gains (losses)	1	1	(3)	(6)
Unrealized gains (losses) on investments | Net unrealized investment gains (losses) with credit losses | Policyholders’ Liabilities
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward]
Net unrealized investment gains (losses)	0	0	0	0
Unrealized gains (losses) on investments | Net unrealized investment gains (losses) with credit losses | Deferred Income Tax Asset (Liability)
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward]
Net unrealized investment gains (losses)	0	0	1	1
Unrealized gains (losses) on investments | Net unrealized investment gains (losses) with credit losses | AOCI Gain (Loss) Related to Net Unrealized Investment Gains Losses
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward]
Net unrealized investment gains (losses)	$ 1	$ 1	$ (2)	$ (5)