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Debt and Lines of Credit (Tables)
12 Months Ended
Aug. 31, 2019
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
Our debt at August 31, 2019 and 2018 consisted of the following (in millions):
 
August 31,
 
2019
 
2018
Senior unsecured public notes due December 2019, principal
$
350.0

 
$
350.0

Senior unsecured public notes due December 2019, unamortized discount and deferred costs
(0.1
)
 
(0.5
)
Industrial revenue bond due June 2021
4.0

 
4.0

Bank loans
2.7

 
3.3

Total debt outstanding, net of unamortized discount and deferred costs
$
356.6

 
$
356.8