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Earnings Per Share - Schedule of Computation (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share    
Net income $ 602,753 $ 268,631
Basic weighted-average common shares outstanding (in shares) 259,815 255,695
Effect of potentially dilutive securities:    
Employee stock purchase program (in shares) 31 25
Diluted weighted-average common shares outstanding (in shares) 263,515 260,175
Basic net income per common share (in dollars per share) $ 2.32 $ 1.05
Diluted net income per common share (in dollars per share) $ 2.29 $ 1.03
Stock options    
Effect of potentially dilutive securities:    
Share-based payment arrangements (in shares) 1,868 2,585
Unvested restricted stock and restricted stock units (including PSUs)    
Effect of potentially dilutive securities:    
Share-based payment arrangements (in shares) 1,801 1,870