v3.26.1
Regulatory Requirements - U.S. Bank Subsidiaries' Regulatory Capital and Capital Ratios (Details)
$ in Millions
Jun. 30, 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 $ 87,568 $ 83,153
Tier 1 capital 97,217 92,728
Total capital $ 108,916 $ 103,449
Risk-based capital ratio    
Common Equity Tier 1 capital (as a percent) 0.149 0.150
Tier 1 capital (as a percent) 0.165 0.168
Total capital (as a percent) 0.185 0.187
Tier 1 leverage (as a percent) 0.060 0.067
SLR (as a percent) 0.049 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 $ 41,092 $ 25,545
Tier 1 capital 41,092 25,545
Total capital 42,034 26,423
Banking Regulation, Tier 1 Leverage Capital, Actual 41,092 25,545
SLR3,4 $ 41,092 $ 25,545
Risk-based capital ratio    
Common Equity Tier 1 capital (as a percent) 0.182 0.203
Tier 1 capital (as a percent) 0.182 0.203
Total capital (as a percent) 0.186 0.210
Tier 1 leverage (as a percent) 0.104 0.101
SLR (as a percent) 0.070 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 $ 16,645 $ 17,298
Tier 1 capital 16,645 17,298
Total capital 17,034 17,665
Banking Regulation, Tier 1 Leverage Capital, Actual 16,645 17,298
SLR3,4 $ 16,645 $ 17,298
Risk-based capital ratio    
Common Equity Tier 1 capital (as a percent) 0.250 0.261
Tier 1 capital (as a percent) 0.250 0.261
Total capital (as a percent) 0.256 0.266
Tier 1 leverage (as a percent) 0.067 0.070
SLR (as a percent) 0.065 0.068