Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Statement of Comprehensive Income [Abstract]
Net income	$ 534	$ 483
Other comprehensive (loss) income, net of tax
Net unrealized (loss) gain on securities available for sale	(139)	239
Net change in defined benefit pension items	(2)	0
Net unrealized (loss) gain on cash flow hedge derivatives	(14)	7
Other comprehensive (loss) income, net of tax	(155)	246
Total comprehensive income	$ 379	$ 729