CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 1,831	$ 1,509	$ 1,608
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) arising during the period	250	(531)	(106)
Reclassification of net (gains) losses to earnings	557	693	435
Net unrealized gains (losses) on AFS securities arising during the period	703	(90)	350
Reclassification of net (gains) losses to earnings	63	59	83
Defined benefit plans:
Net actuarial gain (loss) arising during the period	45	19	28
Amortization of actuarial (gain) loss to earnings	7	13	12
Total other comprehensive income (loss), net of tax	1,625	163	802
Total comprehensive income (loss)	$ 3,456	$ 1,672	$ 2,410