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SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Supplemental Cash Flow Information [Abstract]    
Other current assets $ (1) $ 23
Other noncurrent assets (9) 13
Payables and other current liabilities 42 79
Long-term liabilities and equity 71 (25)
Total $ 103 $ 90