Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 2,777	$ 11,466	$ 1,098
Other comprehensive income (loss), net of tax
Net unrealized (loss) gain on securities available for sale	(7)	162	(730)
Net change in unrealized loss on securities available for sale transferred to securities held to maturity	1	1	1
Net change in defined benefit pension items	44	81	(16)
Net unrealized gain on cash flow hedge derivatives	8	0	0
Other comprehensive income (loss), net of tax	46	244	(745)
Total comprehensive income	$ 2,823	$ 11,710	$ 353