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Common Stock, Preferred Stock and Equity Plans (Details 2)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2016
USD ($)
period
$ / shares
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Dec. 31, 2014
USD ($)
Stock options outstanding and exercisable      
Exercise price range, options outstanding (in shares) | shares 12,642,000    
Exercise price range, options outstanding, weighted-average remaining contractual life (in years) 7 years 22 days    
Exercise price range, options outstanding, weighted-average exercise price (usd per share) $ 81.41    
Exercise price range, options exercisable (in shares) | shares 7,323,000    
Restricted stock and Restricted Stock Units, weighted-average grant-date fair value      
Weighted-average grant-date fair value, restricted stock units vested and expected to vest (usd per share) $ 68.92    
$18.93–$20.00      
Stock options outstanding and exercisable      
Exercise price, low end of range (usd per share) 18.93    
Exercise price, high end of range (usd per share) $ 20.00    
Exercise price range, options outstanding (in shares) | shares 137,000    
Exercise price range, options outstanding, weighted-average remaining contractual life (in years) 1 year 1 month 6 days    
Exercise price range, options outstanding, weighted-average exercise price (usd per share) $ 18.93    
Exercise price range, options exercisable (in shares) | shares 137,000    
Restricted stock and Restricted Stock Units, weighted-average grant-date fair value      
Weighted-average grant-date fair value, restricted stock units vested and expected to vest (usd per share) $ 18.93    
$20.01–$40.00      
Stock options outstanding and exercisable      
Exercise price, low end of range (usd per share) 20.01    
Exercise price, high end of range (usd per share) $ 40    
Exercise price range, options outstanding (in shares) | shares 1,696,000    
Exercise price range, options outstanding, weighted-average remaining contractual life (in years) 3 years 2 months 9 days    
Exercise price range, options outstanding, weighted-average exercise price (usd per share) $ 33.94    
Exercise price range, options exercisable (in shares) | shares 1,696,000    
Restricted stock and Restricted Stock Units, weighted-average grant-date fair value      
Weighted-average grant-date fair value, restricted stock units vested and expected to vest (usd per share) $ 33.94    
$40.01–$60.00      
Stock options outstanding and exercisable      
Exercise price, low end of range (usd per share) 40.01    
Exercise price, high end of range (usd per share) $ 60    
Exercise price range, options outstanding (in shares) | shares 1,867,000    
Exercise price range, options outstanding, weighted-average remaining contractual life (in years) 5 years 7 months 2 days    
Exercise price range, options outstanding, weighted-average exercise price (usd per share) $ 48.26    
Exercise price range, options exercisable (in shares) | shares 1,762,000    
Restricted stock and Restricted Stock Units, weighted-average grant-date fair value      
Weighted-average grant-date fair value, restricted stock units vested and expected to vest (usd per share) $ 48.44    
$60.01–$80.00      
Stock options outstanding and exercisable      
Exercise price, low end of range (usd per share) 60.01    
Exercise price, high end of range (usd per share) $ 80    
Exercise price range, options outstanding (in shares) | shares 1,345,000    
Exercise price range, options outstanding, weighted-average remaining contractual life (in years) 7 years 1 month 10 days    
Exercise price range, options outstanding, weighted-average exercise price (usd per share) $ 75.90    
Exercise price range, options exercisable (in shares) | shares 891,000    
Restricted stock and Restricted Stock Units, weighted-average grant-date fair value      
Weighted-average grant-date fair value, restricted stock units vested and expected to vest (usd per share) $ 75.60    
$80.01–$100.00      
Stock options outstanding and exercisable      
Exercise price, low end of range (usd per share) 80.01    
Exercise price, high end of range (usd per share) $ 100    
Exercise price range, options outstanding (in shares) | shares 4,529,000    
Exercise price range, options outstanding, weighted-average remaining contractual life (in years) 8 years 5 months 12 days    
Exercise price range, options outstanding, weighted-average exercise price (usd per share) $ 90.60    
Exercise price range, options exercisable (in shares) | shares 1,548,000    
Restricted stock and Restricted Stock Units, weighted-average grant-date fair value      
Weighted-average grant-date fair value, restricted stock units vested and expected to vest (usd per share) $ 89.61    
$100.01–$120.00      
Stock options outstanding and exercisable      
Exercise price, low end of range (usd per share) 100.01    
Exercise price, high end of range (usd per share) $ 120.00    
Exercise price range, options outstanding (in shares) | shares 1,604,000    
Exercise price range, options outstanding, weighted-average remaining contractual life (in years) 8 years 18 days    
Exercise price range, options outstanding, weighted-average exercise price (usd per share) $ 109.33    
Exercise price range, options exercisable (in shares) | shares 702,000    
Restricted stock and Restricted Stock Units, weighted-average grant-date fair value      
Weighted-average grant-date fair value, restricted stock units vested and expected to vest (usd per share) $ 109.29    
$120.01–$134.69      
Stock options outstanding and exercisable      
Exercise price, low end of range (usd per share) 120.01    
Exercise price, high end of range (usd per share) $ 134.69    
Exercise price range, options outstanding (in shares) | shares 1,464,000    
Exercise price range, options outstanding, weighted-average remaining contractual life (in years) 8 years 6 months 11 days    
Exercise price range, options outstanding, weighted-average exercise price (usd per share) $ 130.58    
Exercise price range, options exercisable (in shares) | shares 587,000    
Restricted stock and Restricted Stock Units, weighted-average grant-date fair value      
Weighted-average grant-date fair value, restricted stock units vested and expected to vest (usd per share) $ 130.17    
Restricted Stock      
Restricted stock and Restricted Stock Units      
Beginning of the period (in shares) | shares 2,831,000    
Granted (in shares) | shares 857,000    
Vested (in shares) | shares (817,000)    
Cancelled (in shares) | shares (258,000)    
End of the period (in shares) | shares 2,613,000 2,831,000  
Restricted stock and Restricted Stock Units, weighted-average grant-date fair value      
Weighted-average grant-date fair value, as of the beginning of the period (usd per share) $ 98.80    
Weighted-average grant-date fair value, granted (usd per share) 91.49    
Weighted-average grant-date fair value, vested (usd per share) 79.28    
Weighted-average grant-date fair value, cancelled (usd per share) 98.56    
Weighted-average grant-date fair value, as of the end of the period (usd per share) $ 102.54 $ 98.80  
Restricted stock vested in period, total fair value | $ $ 74.1 $ 124.0 $ 54.5
Restricted Stock Units      
Restricted stock and Restricted Stock Units      
Beginning of the period (in shares) | shares 193,000    
Granted (in shares) | shares 847,000    
Vested (in shares) | shares (59,000)    
Cancelled (in shares) | shares (48,000)    
End of the period (in shares) | shares 933,000 193,000  
Restricted stock and Restricted Stock Units, weighted-average grant-date fair value      
Weighted-average grant-date fair value, as of the beginning of the period (usd per share) $ 98.36    
Weighted-average grant-date fair value, granted (usd per share) 90.46    
Weighted-average grant-date fair value, vested (usd per share) 83.13    
Weighted-average grant-date fair value, cancelled (usd per share) 94.54    
Weighted-average grant-date fair value, as of the end of the period (usd per share) $ 92.35 $ 98.36  
Restricted stock vested in period, total fair value | $ $ 5.3 $ 8.0 $ 2.9
Employee Stock Purchase Plan      
Employee Stock Purchase Plan      
Offering period (in months) 12 months    
Number of purchase periods | period 2    
Duration of purchase period 6 months    
Eligible employee purchase price percentage of fair value 85.00%    
Number of shares authorized (shares) | shares 891,353    
Number of shares (shares) | shares 272,000    
Average price paid per share (usd per share) $ 70.70