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Employee Incentive, Deferred Compensation, And Retirement Plans (Details) (USD $)
Share data in Millions, unless otherwise specified
9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Sep. 30, 2014
Incentive Stock Award Plans [Member]
Sep. 30, 2013
Incentive Stock Award Plans [Member]
Sep. 30, 2014
Incentive Stock Award Plans [Member]
Sep. 30, 2013
Incentive Stock Award Plans [Member]
Sep. 30, 2014
Stock Units [Member]
Sep. 30, 2014
SWAP Plan [Member]
Sep. 30, 2014
Mutual Funds [Member]
Dec. 31, 2013
Mutual Funds [Member]
Sep. 30, 2014
Ouriel Securities [Member]
Sep. 30, 2014
Ouriel Securities [Member]
Sep. 30, 2014
Maximum [Member]
Incentive Stock Award Plans [Member]
Sep. 30, 2014
Maximum [Member]
Stock Units [Member]
Sep. 30, 2014
Maximum [Member]
Deferred Compensation Plans [Member]
Sep. 30, 2014
Maximum [Member]
SWAP Plan [Member]
Sep. 30, 2014
Minimum [Member]
Incentive Stock Award Plans [Member]
Sep. 30, 2014
Minimum [Member]
Stock Units [Member]
Sep. 30, 2014
Minimum [Member]
Deferred Compensation Plans [Member]
Sep. 30, 2014
Minimum [Member]
SWAP Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                          
Awards vesting period in years                           8 years 8 years 8 years 7 years 3 years 3 years 5 years 3 years
Shares authorized to grant 3.8                                        
Stock-based compensation $ 70,852,000 $ 124,835,000   $ 30,700,000 $ 39,200,000 $ 79,200,000 $ 109,500,000         $ 6,800,000 $ 6,800,000                
Tax benefit related to stock-based compensation recognized in shareholders' equity       1,000,000 800,000 18,200,000 10,400,000                            
Fair value of awards issued as retention 30,600,000                                        
Retention awards fair value Oriel 11,600,000                                        
Unrecognized compensation expense related to non-vested options               305,500,000                          
Weighted-average period, compensation cost expected to recognized, in years               2 years 7 months 6 days                          
Total number of stock units outstanding               18.4                          
Elective deferrals vested percentage                 100.00%                        
Unvested stock units outstanding               11.8                          
Percentage of incentive compensation deferred into company stock units                 15.00%                        
Percentage of earnings deferred into company stock units                 4.00%                        
Percentage of earnings deferred into company stock units, Company match                 25.00%                        
Percentage of earnings deferred into mutual funds                   2.00%                      
Percentage of additional elective incentive compensation deferral                 1.00%                        
Investments, at fair value 209,131,000   217,228,000             17,600,000 17,000,000                    
Deferred compensation liability $ 14,700,000   $ 14,300,000