Stock-based Compensation (Tables)

A summary of total stock-based compensation expense and the related income tax benefits recognized during the three-month periods ended June 27, 2020 and June 29, 2019 is as follows:



	Three Months Ended
	June 27, 2020			June 29, 2019
	(millions)
Compensation expense	$	15.1		$	23.0
Income tax benefit	(3.1		)	(3.6		)

A summary of stock option activity under all plans during the three months ended June 27, 2020 is as follows:



	Number of Options
	(thousands)
Options outstanding at March 28, 2020	518
Granted	—
Exercised	—
Cancelled/Forfeited	(34	)
Options outstanding at June 27, 2020	484

A summary of restricted stock and service-based RSU activity during the three months ended June 27, 2020 is as follows:



	Number of Shares/Units
	Restricted Stock		Service-based RSUs
	(thousands)
Unvested at March 28, 2020	4		1,094
Granted	—		645
Vested	(4	)	(353	)
Forfeited	—		(20	)
Unvested at June 27, 2020	—		1,366

A summary of performance-based RSU activity during the three months ended June 27, 2020 is as follows:



	Number of Performance-based RSUs
	(thousands)
Unvested at March 28, 2020	934
Granted	—
Change due to performance condition achievement	185
Vested	(720	)
Forfeited	(27	)
Unvested at June 27, 2020	372

A summary of market-based RSU activity during the three months ended June 27, 2020 is as follows:



		Number of Market-based RSUs
		(thousands)
Unvested at March 28, 2020		234
Granted		—
Change due to market condition achievement		—
Vested		—
Forfeited		—
Unvested at June 27, 2020		234



	Three Months Ended
	June 29, 2019
Expected term (years)	2.8
Expected volatility	30.8	%
Expected dividend yield	2.4	%
Risk-free interest rate	1.7	%