CONSOLIDATED STATEMENTS 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	$ 382	$ 430	$ 1,108	$ 1,419
Other comprehensive income (loss):
Net unrealized gains (losses) on cash flow hedge derivatives arising during the period, net of income taxes of $163, ($78), ($30), and ($193), respectively	450	(248)	(84)	(580)
Reclassification adjustment for net (gains) losses on cash flow hedge derivatives included in net income, net of income taxes of $73, $37, $189, and $105, respectively	203	120	522	315
Net unrealized gains (losses) on AFS securities arising during the period, net of income taxes of $179, ($189), $114, and ($160), respectively	541	(578)	339	(490)
Reclassification of net securities (gains) losses to net income, net of income taxes of $5, $7, $14, and $21, respectively	13	23	42	63
Defined benefit plans:
Actuarial gain (loss) arising during the period, net of income taxes of $—, $—, $1, and $—, respectively	0	0	4	0
Amortization of actuarial (gain) loss to net income, net of income taxes of $1, $2, $3, and $4, respectively	2	3	9	9
Total other comprehensive income (loss), net of income taxes	1,209	(680)	832	(683)
Total comprehensive income (loss)	$ 1,591	$ (250)	$ 1,940	$ 736