Loans - Summary of Loans Modified (Details) - USD ($)	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Financing Receivable, Modified [Line Items]
Loans modified in period	$ 848,000,000	$ 1,208,000,000
Lending commitments related to modified loans	191,000,000	156,000,000
Loans that defaulted after modification	$ 0	$ 0
Corporate
Financing Receivable, Modified [Line Items]
Modified loans, percent of total	2.00%	2.00%
Credit Card Loans
Financing Receivable, Modified [Line Items]
Modified loans, percent of total		1.00%
Commercial real estate
Financing Receivable, Modified [Line Items]
Modified loans, percent of total	1.00%	1.00%

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