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Inventories (Tables)
3 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories as of March 31, 2021 and December 31, 2020 were as follows:

In millionsMarch 31, 2021December 31, 2020
Raw material$495 $454 
Work-in-process159 136 
Finished goods722 681 
LIFO reserve(84)(82)
Total inventories$1,292 $1,189