XML 71 R59.htm IDEA: XBRL DOCUMENT v3.20.1
Inventories (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
Inventories    
Finished and in process $ 534 $ 565
Raw materials 266 237
Manufacturing supplies and other 57 59
Total inventories $ 857 $ 861