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Derivative Financial Instruments (Tables)
3 Months Ended
Dec. 31, 2017
Derivatives, Fair Value [Line Items]  
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
The fair values of the swap contracts are presented below.
 
December 31,
 
September 30,
 
2017
 
2017
 
(in millions)
Interest rate swap contracts, designated as cash flow hedges:
 
 
 
Other current liabilities
$
0.7

 
$
1.2

Other noncurrent liabilities
0.2

 
1.3

 
$
0.9

 
$
2.5

 
 
 
 
Currency swap contracts, not designated as hedges:
 
 
 
Other noncurrent liabilities
$
1.3

 
$
1.3