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Inventories (Tables)
 3 Months Ended
Dec. 31, 2023
Inventory Disclosure [Abstract]  
Schedule of Inventories

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

 

 

 

December 31,
2023

 

 

September 30,
2023

 

Finished goods and work in process

 

$

1,083.8

 

 

$

1,044.9

 

Raw materials

 

 

1,045.8

 

 

 

1,049.8

 

Spare parts and supplies

 

 

601.7

 

 

 

578.2

 

Inventories at FIFO cost

 

 

2,731.3

 

 

 

2,672.9

 

LIFO reserve

 

 

(340.0

)

 

 

(341.4

)

Net inventories

 

$

2,391.3

 

 

$

2,331.5