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Inventories (Tables)
 6 Months Ended
Mar. 31, 2022
Inventory Disclosure [Abstract]  
Schedule of Inventories

The components of inventories were as follows (in millions):

 

 

 

March 31,
2022

 

 

September 30,
2021

 

Finished goods and work in process

 

$

1,049.4

 

 

$

972.7

 

Raw materials

 

 

1,000.3

 

 

 

888.1

 

Spare parts and supplies

 

 

504.1

 

 

 

536.4

 

Inventories at FIFO cost

 

 

2,553.8

 

 

 

2,397.2

 

LIFO reserve

 

 

(320.3

)

 

 

(223.9

)

Net inventories

 

$

2,233.5

 

 

$

2,173.3