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Stock-Based Compensation
6 Months Ended
Nov. 27, 2021
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 EndedSix Months Ended
(In millions)November 27, 2021November 28, 2020November 27, 2021November 28, 2020
Stock-based compensation expense$7.0 $2.4 $22.1 $3.9 
Related income tax effect$1.6 $0.6 $5.3 $0.9 
The increase in Stock-based compensation expense was driven in part by the addition of Knoll's equity-based compensation awards. This impact includes the accelerated stock-compensation award expense related to workforce reductions as part of the Knoll integration.
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.