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Share-Based Compensation - Schedule of the Transactions of the Company's Stock Options (Details) - Jun. 30, 2015 - Stock Options - $ / shares
shares in Millions
Total
Stock Options  
Unexercised options outstanding at the beginning of the period (in shares) 2.3
Options granted (in shares) 0.0
Options exercised (in shares) (0.9)
Options forfeited (in shares) 0.0
Unexercised options outstanding at the end of the period (in shares) 1.4
Exercisable at the end of the period (in shares) 1.3
Weighted Average Exercise Price  
Unexercised options outstanding at the beginning of the period (in dollars per share) $ 83.42
Options granted (in dollars per share) 199.86
Options exercised (in dollars per share) 65.60
Options forfeited (in dollars per share) 101.29
Unexercised options outstanding at the end of the period (in dollars per share) 94.29
Exercisable at the end of the period (in dollars per share) $ 91.76
Weighted Average Remaining Contractual Life  
Unexercised options outstanding at the end of the period (in years) 2 years 6 months 12 days
Exercisable at the end of the period (in years) 2 years 4 months 18 days