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Share-based Payments (Tables)
6 Months Ended
Feb. 28, 2021
Share-based Payment Arrangement [Abstract]  
Components of share-based payment expense
The following table presents share-based payment expense for the periods presented (in millions):
Three Months EndedSix Months Ended
February 28, 2021February 29, 2020February 28, 2021February 29, 2020
Share-based payment expense$7.5 $8.0 $15.2 $24.7