v2.4.0.6
Shareholders' Equity (Details) (USD $)
 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2000
Dec. 31, 2006
Dec. 31, 2011
Additional Paid-in Capital [Member]
Dec. 31, 2010
Additional Paid-in Capital [Member]
Dec. 31, 2009
Additional Paid-in Capital [Member]
Dec. 31, 2008
Additional Paid-in Capital [Member]
Dec. 31, 2011
Retained Earnings [Member]
Dec. 31, 2010
Retained Earnings [Member]
Dec. 31, 2009
Retained Earnings [Member]
Dec. 31, 2008
Retained Earnings [Member]
Dec. 31, 2011
Deferred Costs, ESOP [Member]
Dec. 31, 2010
Deferred Costs, ESOP [Member]
Dec. 31, 2009
Deferred Costs, ESOP [Member]
Dec. 31, 2008
Deferred Costs, ESOP [Member]
Dec. 31, 2011
Treasury Stock [Member]
Dec. 31, 2010
Treasury Stock [Member]
Dec. 31, 2009
Treasury Stock [Member]
Dec. 31, 2008
Treasury Stock [Member]
Dec. 31, 2011
Treasury Stock, Value [Member]
Dec. 31, 2010
Treasury Stock, Value [Member]
Dec. 31, 2009
Treasury Stock, Value [Member]
Dec. 31, 2008
Treasury Stock, Value [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ 13,535,600,000 $ 12,412,800,000       $ 4,886,800,000 $ 4,798,500,000 $ 4,635,600,000 $ 3,976,600,000 $ 14,897,800,000 $ 12,732,600,000 $ 9,830,400,000 $ 7,654,900,000 $ 0 $ (52,400,000) $ (77,400,000) $ (86,300,000)         $ 95,300,000 $ 96,400,000 $ 98,500,000 $ 99,200,000
Common stock shares in treasury, shares in thousands 853,000 864,000                               853,000 864,000 882,000 889,000        
Net income 4,347,700,000 5,069,500,000 4,328,800,000             4,347,700,000 5,069,500,000 4,328,800,000                          
Dividends, Common Stock, Cash                   (2,182,500,000) (2,167,300,000) (2,153,300,000)                          
Common Stock, Dividends, Per Share, Declared $ 1.96 $ 1.96 $ 1.96                                            
Treasury Stock, Retired, Cost Method, Amount           (100,000) (1,000,000) (3,300,000)                           (100,000) (1,000,000) (3,300,000)  
Treasury Stock, Shares, Retired                                   (1,000) (28,000) (132,000)          
Stock Issued During Period, Value, Employee Benefit Plan           (108,700,000) (87,600,000) (85,000,000)                           (1,000,000) (1,100,000) 2,600,000  
Stock Issued During Period, Shares, Employee Benefit Plan                                   (10,000) 10,000 125,000          
Stock Granted During Period, Value, Share-based Compensation, Net of Forfeitures           147,400,000 231,000,000 368,500,000                                  
Employee Stock Ownership Plan (ESOP), Gain (Loss) on Transactions in Deferred Shares           49,700,000 20,500,000 6,900,000           52,400,000 25,000,000 8,900,000                  
Common Stock Issued, Employee Stock Trust               371,900,000                                  
Accelerated Share Repurchases, Settlement Payment or Receipt         2,580,000,000                                        
Stock Repurchased During Period, Value       3,000,000,000                                          
Preferred Stock, Shares Authorized 5,000,000                                                
Common Stock, Shares Held in Employee Trust, Shares 50,000,000 50,000,000                                              
Employee benefit trust $ 3,013,100,000 $ 3,013,200,000