v3.26.1
Regulatory Requirements - U.S. Bank Subsidiaries' Regulatory Capital and Capital Ratios (Details)
$ in Millions
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Required Ratio    
Common Equity Tier 1 capital (as a percent) 11.80% 11.80%
Tier 1 capital (as a percent) 0.133 0.133
Total capital (as a percent) 0.153 0.153
Tier 1 leverage (as a percent) 0.040 0.040
SLR (as a percent) 3.50% 5.00%
Risk-based capital    
CET1 capital $ 84,546 $ 83,153
Tier 1 capital 94,235 92,728
Total capital $ 106,481 $ 103,449
Risk-based capital ratio    
Common Equity Tier 1 capital (as a percent) 0.151 0.150
Tier 1 capital (as a percent) 0.169 0.168
Total capital (as a percent) 0.190 0.187
Tier 1 leverage (as a percent) 0.061 0.067
SLR (as a percent) 0.050 0.054
MSBNA    
Well-Capitalized Requirement Ratio [Abstract]    
Common Equity Tier 1 capital (as a percent) 6.50%  
Tier 1 capital (as a percent) 8.00%  
Total capital (as a percent) 0.100  
Tier 1 leverage (as a percent) 0.050  
Required Ratio    
Common Equity Tier 1 capital (as a percent) 7.00%  
Tier 1 capital (as a percent) 0.085  
Total capital (as a percent) 0.105  
Tier 1 leverage (as a percent) 0.040  
SLR (as a percent) 3.50%  
Risk-based capital    
CET1 capital $ 42,136 $ 25,545
Tier 1 capital 42,136 25,545
Total capital 43,207 26,423
Banking Regulation, Tier 1 Leverage Capital, Actual 42,136 25,545
SLR3,4 $ 42,136 $ 25,545
Risk-based capital ratio    
Common Equity Tier 1 capital (as a percent) 0.195 0.203
Tier 1 capital (as a percent) 0.195 0.203
Total capital (as a percent) 0.200 0.210
Tier 1 leverage (as a percent) 0.110 0.101
SLR (as a percent) 0.074 0.076
MSPBNA    
Well-Capitalized Requirement Ratio [Abstract]    
Common Equity Tier 1 capital (as a percent) 6.50%  
Tier 1 capital (as a percent) 8.00%  
Total capital (as a percent) 0.100  
Tier 1 leverage (as a percent) 0.050  
Required Ratio    
Common Equity Tier 1 capital (as a percent) 7.00%  
Tier 1 capital (as a percent) 0.085  
Total capital (as a percent) 0.105  
Tier 1 leverage (as a percent) 0.040  
SLR (as a percent) 3.50%  
Risk-based capital    
CET1 capital $ 18,052 $ 17,298
Tier 1 capital 18,052 17,298
Total capital 18,416 17,665
Banking Regulation, Tier 1 Leverage Capital, Actual 18,052 17,298
SLR3,4 $ 18,052 $ 17,298
Risk-based capital ratio    
Common Equity Tier 1 capital (as a percent) 0.271 0.261
Tier 1 capital (as a percent) 0.271 0.261
Total capital (as a percent) 0.277 0.266
Tier 1 leverage (as a percent) 0.070 0.070
SLR (as a percent) 0.069 0.068