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Derivative Financial Instruments Tables
6 Months Ended
Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
The fair values of the swap contracts are presented below.
 
March 31,
 
September 30,
 
2017
 
2016
 
(in millions)
Other current liabilities
$
1.4

 
$
2.0

Other noncurrent liabilities
0.7

 
5.3

 
$
2.1

 
$
7.3