Loans and Leases - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
LGG loans	$ 360,000,000	$ 541,000,000
LGG loans, repurchase liability	0	456,000,000
LGG loans, repossessed assets	14,000,000	14,000,000
Loans held-for-sale	$ 899,000,000	1,182,000,000
Payment performance period threshold	6 months
Loans 90 days or greater past due and still accruing	$ 0	0
Residential mortgage loans in process of foreclosure	41,000,000	81,000,000
Loans held for investment	67,071,000,000	83,627,000,000
Officers And Directors
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment	$ 1,000,000	$ 9,000,000