Year Ended December 31 (Dollars and Shares in Millions, Except Per Share Data)   2013     2012     2011   2013 v 2012   2012 v 2011  
Total net revenue (taxable-equivalent basis) $ 19,602   $ 20,288   $ 19,108   (3.4) % 6.2 %
Noninterest expense   10,274     10,456     9,911   (1.7)   5.5  
Provision for credit losses   1,340     1,882     2,343   (28.8)   (19.7)  
Income taxes and taxable-equivalent adjustments   2,256     2,460     2,066   (8.3)   19.1  
Net income   5,732     5,490     4,788   4.4   14.7  
Net (income) loss attributable to noncontrolling interests   104     157     84   (33.8)   86.9  
Net income attributable to U.S. Bancorp $ 5,836   $ 5,647   $ 4,872   3.3   15.9  
Net income applicable to U.S. Bancorp common shareholders
$
5,552		  
$
5,383		  
$
4,721		  
3.1		  
14.0		  
Per Common Share                        
Earnings per share $ 3.02   $ 2.85   $ 2.47   6.0 % 15.4 %
Diluted earnings per share $ 3.00   $ 2.84   $ 2.46   5.6   15.4  
Dividends declared per share   .885     .780     .500   13.5   56.0  
Book value per share   19.92     18.31     16.43   8.8   11.4  
Market value per share   40.40     31.94     27.05   26.5   18.1  
Average common shares outstanding   1,839     1,887     1,914   (2.5)   (1.4)  
Average diluted common shares outstanding   1,849     1,896     1,923   (2.5)   (1.4)  
Financial Ratios                    
Return on average assets   1.65 %   1.65 %   1.53 %        
Return on average common equity   15.8     16.2     15.8          
Net interest margin (taxable-equivalent basis)   3.44     3.58     3.65          
Efficiency ratio(a)    52.4     51.5     51.8          
Average Balances                          
Loans $ 227,474   $ 215,374   $ 201,427   5.6 % 6.9 %
Investment securities   75,046     72,501     63,645   3.5   13.9  
Earning assets   315,139     306,270     283,290   2.9   8.1  
Assets   352,680     342,849     318,264   2.9   7.7  
Deposits   250,457     235,710     213,159   6.3   10.6  
Total U.S. Bancorp shareholders' equity   39,917     37,611     32,200   6.1   16.8  
Period End Balances                          
Loans $ 235,235   $ 223,329   $ 209,835   5.3 % 6.4 %
Allowance for credit losses   4,537     4,733     5,014   (4.1)   (5.6)  
Investment securities   79,855     74,528     70,814   7.1   5.2  
Assets   364,021     353,855     340,122   2.9   4.0  
Deposits   262,123     249,183     230,885   5.2   7.9  
Total U.S. Bancorp shareholders' equity   41,113     38,998     33,978   5.4   14.8  
Capital ratios                          
Tier 1 capital   11.2 %   10.8 %   10.8 %        
Total risk-based capital   13.2     13.1     13.3          
Leverage   9.6     9.2     9.1          
Tangible common equity to tangible assets(b)    7.7     7.2     6.6          
Tangible common equity to risk-weighted assets using Basel I definition(b)    9.1     8.6     8.1          
Tier 1 common equity to risk-weighted assets using Basel I definition(b)    9.4     9.0     8.6          
Common equity tier 1 to risk-weighted assets estimated using final rules for the Basel III standardized approach(b)    8.8     –     –          
Common equity tier 1 to risk-weighted assets approximated using proposed rules for the Basel III standardized approach released June 2012(b)    –     8.1     –          
Common equity tier 1 to risk-weighted assets approximated using proposed rules for the Basel III standardized approach released prior to June 2012(b)    –     –     8.2          
(a) Computed as noninterest expense divided by the sum of net interest income on a taxable-equivalent basis and noninterest income excluding net securities gains (losses).
(b) See Non-GAAP Financial Measures beginning on page 65.