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Stock-Based Compensation | 6 Months Ended
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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.

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- Definition 14. Stock-Based Compensation [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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