Significant Credit Concentrations (Details) - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Maximum Credit Exposure by Category
Total on-balance sheet	$ 280	$ 255
Customer Concentration Risk | Individuals | On-balance sheet assets
Maximum Credit Exposure by Category
Total on-balance sheet	211	194
Customer Concentration Risk | Individuals | United States | On-balance sheet assets
Maximum Credit Exposure by Category
Total on-balance sheet	171	160
Customer Concentration Risk | Individuals | Outside the United States | On-balance sheet assets
Maximum Credit Exposure by Category
Total on-balance sheet	40	34
Customer Concentration Risk | Financial Services | On-balance sheet assets
Maximum Credit Exposure by Category
Total on-balance sheet	9	9
Customer Concentration Risk | Other | On-balance sheet assets
Maximum Credit Exposure by Category
Total on-balance sheet	18	17
Customer Concentration Risk | Federal Reserve Bank | On-balance sheet assets
Maximum Credit Exposure by Category
Total on-balance sheet	$ 41	$ 35