COMPREHENSIVE INCOME (LOSS) - Schedule of Components of Accumulated Other Comprehensive Income (Loss), Net of Tax, in the Consolidated Balance Sheets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 5,654	$ 7,038
Current period change	561	(939)	$ (177)
Ending balance	7,187	5,654	7,038
Accumulated Other Comprehensive Income (Loss), Net of Deferred Income Taxes
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(848)	91	268
Current period change	561	(939)	(177)
Ending balance	(287)	(848)	91
URA(D) on securities - temporary
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(816)	122
Current period change	527	(938)
Ending balance	(289)	(816)	122
Foreign currency translation adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	2	20
Current period change	17	(18)
Ending balance	19	2	20
Benefit plan actuarial net gain (loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(33)	(50)
Current period change	17	17
Ending balance	$ (16)	$ (33)	$ (50)