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Share-Based Compensation (Grants of Stock Options and RSUs) (Details) - $ / shares
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Stock Options [Member]    
Equity awards, granted, in shares 1,333,849 1,152,138
Weighted average fair value per award, in dollars per share $ 14.15 $ 14.29
RSUs [Member]    
Equity awards, granted, in shares 411,968 375,064
Weighted average fair value per award, in dollars per share $ 66.82 $ 59.83