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Inventories (Notes)
9 Months Ended
Sep. 30, 2023
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]
3. INVENTORIES

We state our inventories at the lower of cost or net realizable value. The cost of our inventories is determined using the first-in first-out method. When we determine that our gross inventories exceed usage requirements, or if inventories become obsolete or otherwise not saleable, we record a provision for such loss as a component of our inventory accounts.

Inventories consist of the following:
 September 30, 2023December 31, 2022
 (in millions)
   
Raw materials and work-in-progress$406.6 $398.9 
Finished goods86.5 92.5 
Gross inventories493.1 491.4 
Inventory valuation reserves(32.7)(27.5)
Inventories, net$460.4 $463.9