v3.26.1
Fair Values - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - Nonrecurring - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Assets at fair value      
Loans $ 4,577   $ 3,704
Other assets—Other investments 67   64
Other assets—ROU assets 0   20
Total 4,644   3,788
Liabilities      
Other liabilities and accrued expenses—Lending commitments 87   71
Total 87   71
Assets      
Fair Value Adjustment Disclosure      
Gains (losses) from fair value remeasurements (105) $ 8  
Loans      
Fair Value Adjustment Disclosure      
Gains (losses) from fair value remeasurements (104) 19  
Other assets—Other investments      
Fair Value Adjustment Disclosure      
Gains (losses) from fair value remeasurements 0 (6)  
Other assets - Premises, equipement and software      
Fair Value Adjustment Disclosure      
Gains (losses) from fair value remeasurements (1) (5)  
Liabilities      
Fair Value Adjustment Disclosure      
Gains (losses) from fair value remeasurements (16) (8)  
Other liabilities and accrued expenses—Lending commitments      
Fair Value Adjustment Disclosure      
Gains (losses) from fair value remeasurements (16) $ (8)  
Level 2      
Assets at fair value      
Loans 3,070   2,385
Other assets—Other investments 0   0
Other assets—ROU assets 0   20
Total 3,070   2,405
Liabilities      
Other liabilities and accrued expenses—Lending commitments 63   53
Total 63   53
Level 3      
Assets at fair value      
Loans 1,507   1,319
Other assets—Other investments 67   64
Other assets—ROU assets 0   0
Total 1,574   1,383
Liabilities      
Other liabilities and accrued expenses—Lending commitments 24   18
Total $ 24   $ 18