OTHER COMPREHENSIVE INCOME (LOSS) - Schedule of Components of Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Before Tax
Total other comprehensive income (loss)	$ 17	$ 527	$ (481)	$ 941
Tax Effect
Total other comprehensive income (loss)	13	(63)	101	(124)
Net of Tax
Total other comprehensive income (loss), net of tax	30	465	(380)	817
URA(D) of securities
Before Tax
OCI before reclassification	17	350	(439)	692
Reclassification from AOCI	13	10	16	15
Total other comprehensive income (loss)	30	360	(423)	707
Tax Effect
OCI before reclassification	(2)	(49)	79	(107)
Reclassification from AOCI	(1)	(3)	(3)	(3)
Net of Tax
OCI before reclassifications	15	301	(360)	585
Reclassification from AOCI	12	7	13	12
Total other comprehensive income (loss), net of tax	27	308	(347)	597
Foreign currency translation and other adjustments
Before Tax
OCI before reclassification	(12)	177	(58)	244
Tax Effect
OCI before reclassification	16	(13)	26	(16)
Net of Tax
OCI before reclassifications	3	164	(32)	228
Total other comprehensive income (loss), net of tax	3	164	(32)	228
Reclassification of benefit plan liability amortization included in net income (loss)
Before Tax
OCI before reclassification	0	18	0	18
Reclassification from AOCI	0	(28)	(1)	(28)
Tax Effect
OCI before reclassification	0	(4)	0	(4)
Reclassification from AOCI	0	6	0	6
Net of Tax
OCI before reclassifications	0	14	0	14
Reclassification from AOCI	0	(22)	(1)	(22)
Total other comprehensive income (loss), net of tax	$ 0	$ (8)	$ (1)	$ (8)

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