ACQUISITIONS AND DIVESTITURES - Summary of Assets and Liabilities of August Canada Divestitures (Details) - Disposed of by sale - Apache Canada Ltd. (ACL) $ in Millions	Aug. 31, 2017 USD ($)
ASSETS
Cash	$ 46
Other current assets	64
Property, plant & equipment	1,132
Total Assets	1,242
LIABILITIES
Current liabilities, excluding asset retirement obligation	120
Asset retirement obligation	780
Other long-term liabilities	46
Total Liabilities	$ 946

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