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Commitments, Contingent Liabilities and Guarantees - Risk Rating Under the Risk Rating System (Details) - Commitments to extend credit - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Line of Credit Facility    
Commitments $ 114,164 $ 84,405
Pass    
Line of Credit Facility    
Commitments 111,746 82,536
Special mention    
Line of Credit Facility    
Commitments 1,448 834
Substandard    
Line of Credit Facility    
Commitments 959 991
Doubtful    
Line of Credit Facility    
Commitments $ 11 $ 44