CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 436	$ 392	$ 809	$ 726
Other comprehensive income (loss):
Net unrealized gains (losses) on cash flow hedge derivatives arising during the period, net of income taxes of $30, ($48), $106, and ($193), respectively	83	(129)	291	(534)
Reclassification adjustment for net (gains) losses on cash flow hedge derivatives included in net income, net of income taxes of $53, $62, $107, and $116, respectively	145	170	293	319
Net unrealized gains (losses) on AFS securities arising during the period, net of income taxes of $20, ($9), $115, and ($65), respectively	56	(29)	338	(202)
Reclassification of net securities (gains) losses on AFS securities to net income, net of income taxes of $6, $4, $10, and $9, respectively	17	15	30	29
Defined benefit plans:
Actuarial gain (loss) arising during the period, net of income taxes	0	0	0	4
Amortization of actuarial (gain) loss to net income, net of income taxes	1	2	4	7
Total other comprehensive income (loss), net of income taxes	302	29	956	(377)
Total comprehensive income (loss)	$ 738	$ 421	$ 1,765	$ 349