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Share-Based Compensation (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
9 Months Ended
Sep. 30, 2014
awards
Sep. 30, 2013
Sep. 30, 2014
Minimum [Member]
Sep. 30, 2014
Maximum [Member]
May 31, 2011
Global Equity Incentive Plan, 2011 [Member]
May 31, 2010
Global Equity Incentive Plan, 2010 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Proportional vesting rate     0.00% 100.00%    
Shares authorized under share awards plan         28,000,000 3,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms 1 year 5 months 15 days          
Share-based compensation expense $ 104.3 $ 103.0        
Proceeds from Stock Options Exercised 8.6 13.0        
Number of Share Awards By Type 2          
Fair value of vested shares 191.5 185.0        
Weighted average fair value of shares granted $ 34.33 $ 26.86        
Unrecognized compensation cost related to non-vested shares 271.5          
Weighted average non-vested shares compensation cost expected to recognize 2 years 8 months 15 days          
recognized expense for employee stock purchase $ 0.6 $ 0.7