Earnings Per Share - Schedule of Computation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share
Net income	$ 66,924	$ 837,270	$ 720,062	$ 1,440,023
Basic weighted-average common shares outstanding (in shares)	258,988	259,637	259,179	260,013
Effect of potentially dilutive securities:
Employee stock purchase program (in shares)	3	8	5	20
Diluted weighted-average common shares outstanding (in shares)	261,020	263,403	261,468	263,746
Basic net income per common share (in dollars per share)	$ 0.26	$ 3.22	$ 2.78	$ 5.54
Diluted net income per common share (in dollars per share)	$ 0.26	$ 3.18	$ 2.75	$ 5.46
Stock options
Effect of potentially dilutive securities:
Share-based payment arrangements (in shares)	1,137	2,054	1,200	1,961
Restricted stock units (including PSUs)
Effect of potentially dilutive securities:
Share-based payment arrangements (in shares)	892	1,704	1,084	1,752