OTHER COMPREHENSIVE INCOME (LOSS) - Schedule of Components of Comprehensive Income (Loss) (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)	$ 527	$ (61)	$ 941	$ (290)
Tax Effect
Total other comprehensive income (loss)	(63)	25	(124)	63
Net of Tax
Total other comprehensive income (loss), net of tax	465	(36)	817	(227)
URA(D) of securities
Before Tax
OCI before reclassification	350	(101)	692	(293)
Reclassification from AOCI	10	11	15	17
Total other comprehensive income (loss)	360	(90)	707	(276)
Tax Effect
OCI before reclassification	(49)	32	(107)	66
Reclassification from AOCI	(3)	(2)	(3)	(3)
Net of Tax
OCI before reclassifications	301	(70)	585	(227)
Reclassification from AOCI	7	9	12	14
Total other comprehensive income (loss), net of tax	308	(60)	597	(213)
Foreign currency translation and other adjustments
Before Tax
OCI before reclassification	177	(2)	244	(45)
Tax Effect
OCI before reclassification	(13)	2	(16)	7
Net of Tax
OCI before reclassifications	164	0	228	(38)
Total other comprehensive income (loss), net of tax	164	0	228	(38)
Reclassification of benefit plan liability amortization included in net income (loss)
Before Tax
Reclassification from AOCI	(10)	31	(10)	31
Tax Effect
Reclassification from AOCI	2	(6)	2	(7)
Net of Tax
Reclassification from AOCI	(8)	24	(8)	25
Total other comprehensive income (loss), net of tax	$ (8)	$ 24	$ (8)	$ 25

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