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Identifiable Intangible Assets (Tables)
 12 Months Ended
Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Intangible Assets and Goodwill [Table Text Block]
Intangible assets are presented below.
 
September 30,
 
2017
 
2016
 
(in millions)
Capitalized external-use software:
 
 
 
Cost
$
28.4

 
$
20.9

Accumulated amortization
(11.3
)
 
(8.9
)
Net book value
17.1

 
12.0

 
 
 
 
Business combination-related:
 
 
 
Cost:
 
 
 
Finite-lived intangible assets:
 
 
 
Technology
76.7

 
76.8

Customer relationships and other
359.2

 
350.5

Indefinite-lived intangible assets:
 
 
 
Trade names and trademarks
266.8

 
263.6

Goodwill
12.9

 
5.4

 
715.6

 
696.3

Accumulated amortization:
 
 
 
Technology
(72.2
)
 
(71.5
)
Customer relationships and other
(221.2
)
 
(202.2
)
 
(293.4
)
 
(273.7
)
Net book value
422.2

 
422.6

Total intangible assets net book value
$
439.3

 
$
434.6