Earnings Per Share - Schedule of Computation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share
Net income	$ 667,434	$ 57,518	$ 2,107,457	$ 593,576
Basic weighted-average common shares outstanding (in shares)	260,392	256,946	260,313	256,289
Effect of potentially dilutive securities:
Employee stock purchase program (in shares)	12	13	17	14
Diluted weighted-average common shares outstanding (in shares)	264,079	260,473	264,031	260,182
Basic net income per common share (in dollars per share)	$ 2.56	$ 0.22	$ 8.10	$ 2.32
Diluted net income per common share (in dollars per share)	$ 2.53	$ 0.22	$ 7.98	$ 2.28
Stock options
Effect of potentially dilutive securities:
Share-based payment arrangements (in shares)	1,887	2,080	1,936	2,297
Restricted stock and restricted stock units (including PSUs)
Effect of potentially dilutive securities:
Share-based payment arrangements (in shares)	1,788	1,434	1,765	1,582