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Inventories (Tables)
6 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current
Inventories consist of (in millions):
 
March 31,
2020
 
September 30,
2019
Finished goods
$
280.8

 
$
223.7

Work in process
174.9

 
178.4

Raw materials
173.3

 
173.6

Inventories
$
629.0

 
$
575.7