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OTHER FINANCIAL INFORMATION - Inventories (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Other Financial Information [Abstract]    
Raw materials $ 1,021 $ 1,080
Work in process 924 976
Finished goods 1,043 958
Total 2,988 3,014
Inventories 1,772 1,683
Other long-term assets $ 1,216 $ 1,331