Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Computation of Earnings Per Share

The computation of earnings per share is as follows:

	Three Months Ended				Nine Months Ended
	September 30, 2020		September 30, 2019		September 30, 2020		September 30, 2019
	(in thousands, except per share data)
Basic earnings per share:
Net income	$	789,976	$	665,244	$	2,219,239	$	1,279,946
Shares used in computation:
Weighted-average common shares outstanding	441,526		438,090		440,486		437,547
Basic earnings per share	$	1.79	$	1.52	$	5.04	$	2.93
Diluted earnings per share:
Net income	$	789,976	$	665,244	$	2,219,239	$	1,279,946
Shares used in computation:
Weighted-average common shares outstanding	441,526		438,090		440,486		437,547
Employee stock options	13,562		13,462		13,360		14,349
Weighted-average number of shares	455,088		451,552		453,846		451,896
Diluted earnings per share	$	1.74	$	1.47	$	4.89	$	2.83

Summary of Potential Common Shares Excluded from the Diluted Calculation

The following table summarizes the potential common shares excluded from the diluted calculation:

	Three Months Ended		Nine Months Ended
	September 30, 2020	September 30, 2019	September 30, 2020	September 30, 2019
	(in thousands)
Employee stock options	124	2,402	560	1,268