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Inventories (Tables)
3 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Inventories
The components of total inventories are summarized as follows: 
(in millions)March 31,
2021
December 31,
2020
Finished goods$232 $221 
Work in process58 49 
Raw materials306 288 
Total inventories$596 $558