XML 70 R57.htm IDEA: XBRL DOCUMENT v3.21.1
Inventories (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Inventories    
Finished and in process $ 573 $ 584
Raw materials 283 236
Manufacturing supplies and other 94 97
Total inventories $ 950 $ 917