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Inventories (Notes)
3 Months Ended
Mar. 31, 2024
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]
2. 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:
 March 31, 2024December 31, 2023
 (in millions)
   
Raw materials and work-in-progress$413.2 $411.5 
Finished goods96.6 103.5 
Gross inventories509.8 515.0 
Inventory valuation reserves(33.0)(32.1)
Inventories, net$476.8 $482.9