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Common Stock, Preferred Stock and Equity Plans - Stock Options Outstanding and Exercisable (Details)
shares in Thousands
12 Months Ended
Dec. 31, 2018
$ / shares
shares
Stock options outstanding and exercisable  
Options outstanding (in shares) | shares 8,551
Options outstanding, weighted-average remaining contractual life 6 years 11 months 1 day
Options outstanding, weighted-average exercise price (usd per share) $ 111.46
Options exercisable (in shares) | shares 4,577
Options exercisable, weighted-average exercise price (usd per share) $ 93.21
$29.07–$40.00  
Stock options outstanding and exercisable  
Exercise price, low end of range (usd per share) 29.07
Exercise price, high end of range (usd per share) $ 40
Options outstanding (in shares) | shares 532
Options outstanding, weighted-average remaining contractual life 1 year 29 days
Options outstanding, weighted-average exercise price (usd per share) $ 34.89
Options exercisable (in shares) | shares 532
Options exercisable, weighted-average exercise price (usd per share) $ 35.89
$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
Options outstanding (in shares) | shares 470
Options outstanding, weighted-average remaining contractual life 3 years 6 months 4 days
Options outstanding, weighted-average exercise price (usd per share) $ 50.04
Options exercisable (in shares) | shares 470
Options exercisable, weighted-average exercise price (usd per share) $ 50.04
$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
Options outstanding (in shares) | shares 543
Options outstanding, weighted-average remaining contractual life 5 years 3 months
Options outstanding, weighted-average exercise price (usd per share) $ 74.90
Options exercisable (in shares) | shares 533
Options exercisable, weighted-average exercise price (usd per share) $ 74.89
$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
Options outstanding (in shares) | shares 2,839
Options outstanding, weighted-average remaining contractual life 7 years 2 months 5 days
Options outstanding, weighted-average exercise price (usd per share) $ 89.19
Options exercisable (in shares) | shares 1,320
Options exercisable, weighted-average exercise price (usd per share) $ 89.85
$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
Options outstanding (in shares) | shares 693
Options outstanding, weighted-average remaining contractual life 6 years 1 month 2 days
Options outstanding, weighted-average exercise price (usd per share) $ 109.30
Options exercisable (in shares) | shares 603
Options exercisable, weighted-average exercise price (usd per share) $ 109.22
$120.01–$140.00  
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) $ 140.00
Options outstanding (in shares) | shares 839
Options outstanding, weighted-average remaining contractual life 6 years 7 months 13 days
Options outstanding, weighted-average exercise price (usd per share) $ 130.27
Options exercisable (in shares) | shares 642
Options exercisable, weighted-average exercise price (usd per share) $ 130.24
$140.01–$160.00  
Stock options outstanding and exercisable  
Exercise price, low end of range (usd per share) 140.01
Exercise price, high end of range (usd per share) $ 160.00
Options outstanding (in shares) | shares 1,400
Options outstanding, weighted-average remaining contractual life 9 years 22 days
Options outstanding, weighted-average exercise price (usd per share) $ 155.52
Options exercisable (in shares) | shares 271
Options exercisable, weighted-average exercise price (usd per share) $ 155.30
$160.01–$180.00  
Stock options outstanding and exercisable  
Exercise price, low end of range (usd per share) 160.01
Exercise price, high end of range (usd per share) $ 160.00
Options outstanding (in shares) | shares 526
Options outstanding, weighted-average remaining contractual life 8 years 6 months
Options outstanding, weighted-average exercise price (usd per share) $ 162.94
Options exercisable (in shares) | shares 156
Options exercisable, weighted-average exercise price (usd per share) $ 162.94
$180.01–$181.60  
Stock options outstanding and exercisable  
Exercise price, low end of range (usd per share) 180.01
Exercise price, high end of range (usd per share) $ 181.6
Options outstanding (in shares) | shares 709
Options outstanding, weighted-average remaining contractual life 9 years 6 months 11 days
Options outstanding, weighted-average exercise price (usd per share) $ 181.60
Options exercisable (in shares) | shares 50
Options exercisable, weighted-average exercise price (usd per share) $ 181.60