Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 721	$ 690	$ 1,907	$ 2,259
Other comprehensive income (loss), net of tax and reclassification adjustments:
Net unrealized gains (losses) on investment securities	230	(3)	238	(2)
Cash flow hedges adjustments	291	(70)	196	(146)
Defined benefit plans liability adjustments	(1)	(1)	2	(4)
Other	4	(3)	(4)	0
Total other comprehensive income (loss)	524	(77)	432	(152)
Total comprehensive income	$ 1,245	$ 613	$ 2,339	$ 2,107