OTHER COMPREHENSIVE INCOME (LOSS) - Schedule of Components of Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Before Tax
Total other comprehensive income (loss)	$ (229)	$ 312
Tax Effect
Total other comprehensive income (loss)	38	(32)
Net of Tax
Total other comprehensive income (loss), net of tax	(191)	280
URA(D) on securities
Before Tax
OCI before reclassification, before tax	(192)	273
Reclassification from AOCI, before tax	5	6
Tax Effect
OCI before reclassification, tax effect	34	(27)
Reclassification from AOCI, tax	(1)	(3)
Net of Tax
OCI before reclassifications, net of tax	(158)	246
Reclassification from AOCI, net of tax	5	3
Total other comprehensive income (loss), net of tax	(153)	249
Foreign currency translation adjustments
Before Tax
OCI before reclassification, before tax	(43)	33
Tax Effect
OCI before reclassification, tax effect	5	(2)
Net of Tax
OCI before reclassifications, net of tax	(38)	31
Total other comprehensive income (loss), net of tax	(38)	31
Benefit plan net gain (loss)
Before Tax
Reclassification from AOCI, before tax	1	0
Tax Effect
Reclassification from AOCI, tax	0	0
Net of Tax
Reclassification from AOCI, net of tax	0	0
Total other comprehensive income (loss), net of tax	$ 0	$ 0

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