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Share-based Payments (Tables)
3 Months Ended
Nov. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Payment Expense and Shares Issued Upon Exercise of Options
The following table presents share-based payment expense and new shares issued upon exercise of stock options for the three months ended November 30, 2018 and 2017 (in millions, except shares):
 
Three Months Ended
 
November 30, 2018

November 30, 2017
Share-based payment expense
$
7.8

 
$
8.5

Shares issued from option exercises

 
6,156