Earnings Per Share - Computation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Basic earnings per share:
Net income	$ 1,597,447	$ 1,706,715
Weighted-average shares of common stock outstanding (in shares)	444,146	443,224
Basic earnings per share (dollars per share)	$ 3.60	$ 3.85
Diluted earnings per share:
Net income	$ 1,597,447	$ 1,706,715
Shares used in computation:
Weighted-average shares of common stock outstanding (in shares)	444,146	443,224
Employee stock options (in shares)	8,838	12,417
Weighted-average number of shares (in shares)	452,984	455,641
Diluted earnings per share (dollars per share)	$ 3.53	$ 3.75