CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net Income	$ 520	$ 558
Net unrealized losses on available-for-sale debt securities:
Unrealized holding (losses) gains arising during period	(182)	600
Unrealized losses on available-for-sale debt securities transferred to held-to-maturity securities	785	0
Reclassification adjustment for net losses included in net income	3	0
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	(785)	0
Amortization of unrealized losses on available-for-sale debt securities transferred to held-to-maturity securities	25	0
Net unrealized losses on cash flow hedge derivatives:
Unrealized holding (losses) gains arising during period	(316)	215
Reclassification adjustment for net losses included in net income	69	50
Other comprehensive (loss) income, net of tax	(401)	865
Comprehensive Income	$ 119	$ 1,423