Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 655	$ 867	$ 1,186	$ 1,569
Other comprehensive income (loss), net of tax and reclassification adjustments:
Net unrealized gains (losses) on investment securities	18	(64)	8	1
Cash flow hedges adjustments	22	(156)	(95)	(75)
Defined benefit plans liability adjustments	(2)	(1)	(3)	(3)
Other	0	1	(2)	2
Total other comprehensive income (loss)	38	(220)	(92)	(75)
Total comprehensive income	$ 693	$ 647	$ 1,094	$ 1,494