Loans Held for Sale - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale	[1]	$ 650		$ 650		$ 406
Gain (loss) associated with the economic hedging program		0	$ 0	0	$ 0
Valuation allowance		2		2		0
Commercial loans held for sale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans held-for-sale		424		424		395
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		649		649		406
Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		1		1		0
Loans Transferred From Portfolio Loans to Held For Sale | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		225		225		11
Lower of amortized cost or fair value adjustment		0	$ 0	0	$ 0
Residential mortgages | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		1		1		0
Commercial Real Estate Loans | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		$ 0		$ 0		$ 79

[1] The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at September 30, 2025 and December 31, 2024. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 15, "Variable Interest Entities," for additional information. September 30, 2025December 31, 2024(in millions)AssetsOther assets$7 $11 Total assets$7 $11 LiabilitiesInterest, taxes and other liabilities$14 $4 Total liabilities$14 $4