CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net Income	$ 515	$ 520
Net unrealized losses on available-for-sale debt securities:
Unrealized holding gains (losses) arising during period	481	(182)
Unrealized losses on available-for-sale debt securities transferred to held-to-maturity securities	0	785
Reclassification adjustment for net losses included in net income	0	3
Net unrealized losses on available-for-sale debt securities transferred to held-to-maturity securities:
Unrealized losses on available-for-sale debt securities transferred to held-to-maturity securities	0	(785)
Amortization of unrealized losses on available-for-sale debt securities transferred to held-to-maturity securities	25	25
Net unrealized losses on cash flow hedge derivatives:
Unrealized holding gains (losses) arising during period	193	(316)
Reclassification adjustment for net losses included in net income	42	69
Other comprehensive income (loss), net of tax	741	(401)
Comprehensive Income	$ 1,256	$ 119