OTHER COMPREHENSIVE INCOME (LOSS) - Schedule of Components of Comprehensive Income (Loss) in the Consolidated Statements of Operations (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Before Tax
Total other comprehensive income (loss), before tax	$ 162	$ (10)	$ 374	$ (108)
Tax Effect
Total other comprehensive income (loss), tax effect	(34)	2	(79)	23
Net of Tax
Total other comprehensive income (loss), net of tax	128	(8)	296	(85)
URA(D) of securities
Before Tax
OCI before reclassification, before tax	109	(43)	305	(121)
Reclassification of net realized losses (gains) included in net income (loss), before tax	2	11	5	16
Tax Effect
OCI before reclassification, tax effect	(23)	9	(64)	26
Reclassification of net realized losses (gains) included in net income (loss), tax effect	0	(2)	(1)	(3)
Net of Tax
OCI before reclassifications, net of tax	86	(34)	241	(96)
Reclassification of net realized losses (gains) included in net income (loss), net of tax	2	9	4	12
Total other comprehensive income (loss), net of tax	88	(25)	245	(84)
Foreign currency translation adjustments
Before Tax
OCI before reclassification, before tax	61	(9)	75	(33)
Tax Effect
OCI before reclassification, tax effect	(13)	2	(16)	7
Net of Tax
OCI before reclassifications, net of tax	48	(7)	59	(26)
Total other comprehensive income (loss), net of tax	48	(7)	59	(26)
Benefit plan net gain (loss)
Before Tax
Reclassification of net realized losses (gains) included in net income (loss), before tax	(10)	31	(10)	31
Tax Effect
Reclassification of net realized losses (gains) included in net income (loss), tax effect	2	(6)	2	(7)
Net of Tax
Reclassification of net realized losses (gains) included in net income (loss), net of tax	(8)	24	(8)	25
Total other comprehensive income (loss), net of tax	$ (8)	$ 24	$ (8)	$ 25

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