Stock-Based Compensation

6 Months Ended

Nov. 30, 2019

Stock-Based Compensation [Abstract]

Stock-Based Compensation

Stock-Based Compensation

The following table summarizes the stock-based compensation expense and related income tax effect for the three and six months ended:

	Three Months Ended				Six Months Ended
(In millions)	November 30, 2019		December 1, 2018		November 30, 2019		December 1, 2018
Stock-based compensation expense	$	2.8	$	2.6	$	5.4	$	5.0
Related income tax effect	0.6		0.6		1.2		1.1

Certain of the Company's equity-based compensation awards contain provisions that allow for continued vesting into retirement. Stock-based awards are considered fully vested for expense attribution purposes when the employee's retention of the award is no longer contingent on providing subsequent service.