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Inventories, net
12 Months Ended
Dec. 31, 2022
Inventory Disclosure [Abstract]  
Inventories, net Inventories, net
Inventories, net consisted of the following:
December 31,
20222021
Raw materials$261 $265 
Work-in-process125 117 
Finished goods, net641 461 
Materials and supplies, net251 205 
Inventories, net$1,278 $1,048 
Materials and supplies, net consists of processing chemicals, maintenance supplies, and spare parts, which will be consumed directly and indirectly in the production of our products.
At December 31, 2022 and 2021, inventory obsolescence reserves were $42 million and $43 million, respectively. At December 31, 2022 and December 31, 2021, reserves for lower of cost and net realizable value were $27 million and $11 million, respectively.