CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 334	$ 511
Other comprehensive income (loss):
Net unrealized derivative instruments gains (losses) arising during the periods, net of income taxes of ($145) and $60, respectively	(405)	173
Reclassification adjustment for net derivative (gains) losses included in net income, net of income taxes of $54 and $33, respectively	149	94
Net unrealized debt securities gains (losses) arising during the periods, net of income taxes of ($56) and $109, respectively	(173)	327
Reclassification of net debt securities (gains) losses to net income, net of income taxes of $5 and $7, respectively	14	20
Employee benefit plans:
Actuarial gain (loss), net of income taxes of $1 and $—, respectively	4	0
Reclassification of actuarial (gain) loss to net income, net of income taxes of $1 and $1, respectively	5	3
Total other comprehensive income (loss), net of income taxes	(406)	617
Total comprehensive income (loss)	$ (72)	$ 1,128