Common Stock and Employee Equity Plans (Tables)

3 Months Ended

Mar. 27, 2021

Equity [Abstract]

Schedule of Common Shares Outstanding

Shares of common stock outstanding were as follows:

	Three Months Ended
	March 27, 2021	March 28, 2020
	(In millions)
Balance, beginning of period	1,211	1,170
Common stock issued under employee equity plans	1	1
Issuance of common stock to settle convertible debt	3	—
Balance, end of period	1,215	1,171

Share-based Payment Arrangement, Expensed and Capitalized, Amount

Stock-based compensation expense was as follows: 

		Three Months Ended
		March 27, 2021		March 28, 2020
	(In millions)
Cost of sales		$	1	$	2
Research and development		55		37
Marketing, general and administrative		29		20
Total stock-based compensation expense before income taxes		85		59
Income tax benefit		(13)		—
Total stock-based compensation expense after income taxes		$	72	$	59