CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 373	$ 334
Other comprehensive income (loss):
Net unrealized gains (losses) on cash flow hedge derivatives arising during the period, net of income taxes of $76 and ($145), respectively	208	(405)
Reclassification adjustment for net (gains) losses on cash flow hedge derivatives included in net income, net of income taxes of $54 and $54, respectively	148	149
Net unrealized gains (losses) on AFS securities arising during the period, net of income taxes of $95 and ($56), respectively	282	(173)
Reclassification of net securities (gains) losses on AFS securities to net income, net of income taxes of $4 and $5, respectively	13	14
Defined benefit plans:
Actuarial gain (loss) arising during the period, net of income taxes of $— and $1, respectively	0	4
Amortization of actuarial (gain) loss to net income, net of income taxes of $1 and $1, respectively	3	5
Total other comprehensive income (loss), net of income taxes	654	(406)
Total comprehensive income (loss)	$ 1,027	$ (72)