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SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Supplemental Cash Flow Information [Abstract]      
Current assets $ (5) $ (47) $ 13
Other assets 15 43 29
Current liabilities (82) (38) 59
Long-term liabilities and equity (17) 87 43
Other items, net (89) 45 144
Interest Paid, Including Capitalized Interest, Operating and Investing Activities [Abstract]      
Interest, net of amounts capitalized 235 239 263
Income Taxes Paid, Net [Abstract]      
Income taxes 217 202 97
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]      
Outstanding trade payables related to capital expenditures 22 18 27
(Gain) loss from equity investments $ (10) $ (17) $ (14)