Earnings Per Share - Schedule of Computation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share
Net income	$ 837,270	$ 267,427	$ 1,440,023	$ 536,058
Basic weighted-average common shares outstanding (in shares)	259,637	256,154	260,013	255,941
Effect of potentially dilutive securities:
Employee stock purchase program (in shares)	8	3	20	14
Diluted weighted-average common shares outstanding (in shares)	263,403	259,822	263,746	260,015
Basic net income per common share (in dollars per share)	$ 3.22	$ 1.04	$ 5.54	$ 2.09
Diluted net income per common share (in dollars per share)	$ 3.18	$ 1.03	$ 5.46	$ 2.06
Stock options
Effect of potentially dilutive securities:
Share-based payment arrangements (in shares)	2,054	2,225	1,961	2,405
Restricted stock and restricted stock units (including PSUs)
Effect of potentially dilutive securities:
Share-based payment arrangements (in shares)	1,704	1,440	1,752	1,655