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Inventories (Tables)
3 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current Inventories consist of (in millions): 
 
December 31,
2018
 
September 30,
2018
Finished goods
$
246.8

 
$
224.3

Work in process
194.4

 
180.0

Raw materials
186.0

 
177.3

Inventories
$
627.2

 
$
581.6