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Inventories
6 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Inventories Inventories
Inventories consist of (in millions):
 
March 31,
2019
 
September 30,
2018
Finished goods
$
268.9

 
$
224.3

Work in process
203.5

 
180.0

Raw materials
193.0

 
177.3

Inventories
$
665.4

 
$
581.6