Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share (Narrative) (Details)

v3.5.0.2
Earnings Per Share (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Stock repurchase plan, authorized amount $ 700,000,000   $ 700,000,000  
Aggregate shares repurchased under stock repurchase plan (in shares)     20,992,940  
Stock purchase value     $ 526,522,000  
Stock Options And Service-Based Restricted Stock Units [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive securities excluded from computation of earnings per share, number of shares 575,541 192,652 506,437 141,844
Performance-Based Restricted Stock Units [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive securities excluded from computation of earnings per share, number of shares 71,243 122,857 68,897 123,075
Weighted Average Diluted Shares Outstanding Impact [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Adoption of Recent Accounting Pronouncement Impact on Weighted Average Shares Outstanding 227,047   243,002