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Share-Based Compensation - Schedule of the Transactions of the Company's Stock Options (Details) - Stock Options
shares in Millions
 9 Months Ended
Sep. 30, 2016
$ / shares
shares
Stock Options  
Unexercised options outstanding at the beginning of the period (in shares) | shares 1.4
Options granted (in shares) | shares 0.4
Options exercised (in shares) | shares (0.2)
Unexercised options outstanding at the end of the period (in shares) | shares 1.6
Exercisable at the end of the period (in shares) | shares 1.2
Weighted Average Exercise Price  
Unexercised options outstanding at the beginning of the period (in dollars per share) | $ / shares $ 96.18
Options granted (in dollars per share) | $ / shares 122.82
Options exercised (in dollars per share) | $ / shares 77.40
Unexercised options outstanding at the end of the period (in dollars per share) | $ / shares 105.15
Exercisable at the end of the period (in dollars per share) | $ / shares $ 97.07
Weighted Average Remaining Contractual Life  
Unexercised options outstanding at the end of the period (in years) 2 years 9 months 18 days
Exercisable at the end of the period (in years) 1 year 5 months 18 days