Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Deferred tax assets:
Deferred fees	$ 1,557	$ 1,699
Basis differences related to derivative instruments	294	437
Credit related items and allowance for loan losses	1,460	1,360
Basis differences related to assets held-for-investment and held-for-sale	1,180	980
Basis differences related to fair value hedge accounting	150	0
Other items, net	448	606
Total deferred tax assets	5,089	5,082
Deferred tax liabilities:
Basis differences related to fair value hedge accounting	0	(30)
Unrealized gains related to available-for-sale securities	(35)	(17)
Total deferred tax liabilities	(35)	(47)
Valuation allowance	(14)	(17)
Deferred tax assets, net	$ 5,040	$ 5,018