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Pension Plans (Tables)
3 Months Ended
Nov. 30, 2018
Retirement Benefits [Abstract]  
Schedule of Net Periodic Pension Cost
Service cost of net periodic pension cost is allocated between Cost of products sold and Selling, distribution, and administrative expenses in the Consolidated Statements of Comprehensive Income based on the nature of the employee's services. All other components of net periodic pension cost are included within Miscellaneous expense, net in the Consolidated Statements of Comprehensive Income. Net periodic pension cost during the three months ended November 30, 2018 and 2017 included the following components before tax (in millions):
 
Three Months Ended
 
November 30, 2018

November 30, 2017
Service cost
$
0.8

 
$
0.7

Interest cost
2.2

 
2.2

Expected return on plan assets
(3.1
)
 
(3.1
)
Amortization of prior service cost
0.8

 
0.8

Settlement loss
0.4

 

Recognized actuarial loss
1.1

 
1.7

Net periodic pension cost
$
2.2

 
$
2.3