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Inventories (Tables)
3 Months Ended
Mar. 31, 2022
Inventory Disclosure [Abstract]  
Inventories
($ in millions)March 31, 2022December 31, 2021
Finished products$1,369 $1,175 
Work in process257 234 
Raw materials774 723 
Supplies39 39 
Total Inventories$2,439 $2,171