Investments Securities - Gain (Loss) on Securities (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024		Jun. 30, 2025	Jun. 30, 2024
Gain (Loss) on Securities [Line Items]
Recognized Pre Tax Gain Loss on Terminated Hedges		$ 485			$ 485
Noninterest Income	$ 1,400	(5,212)		$ 2,792	(3,766)
Securities gains (losses)
Gain (Loss) on Securities [Line Items]
Gross realized losses(1)	(18)	(6,650)	[1]	(21)	(6,650)	[1]
Debt Securities, Available-for-Sale, Realized Gain	0			2	0
Noninterest Income	$ (18)	$ (6,650)		$ (19)	$ (6,650)

[1] Includes $9 million and $18 million of income recognized for the three and six months ended June 30, 2025, respectively, and $10 million and $20 million for the three and six months ended June 30, 2024, respectively, from securities with terminated hedges that were reclassified to HTM. The income recognized was offset by the amortization of the fair value mark.