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Inventories
3 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Inventories
10. Inventories
The components of inventory are as follows:
March 31,December 31,
(MILLIONS OF DOLLARS)20212020
Finished goods$803 $805 
Work-in-process642 594 
Raw materials and supplies255 229 
Inventories$1,700 $1,628