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Acquisitions and Divestitures - Additional Information (Detail) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jul. 31, 2017
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Business Acquisition [Line Items]              
Refundable deposits for sale of non-core assets             $ 40
Gain on sale of non-core assets     $ (21) $ 17 $ 320 $ 16  
Equity ownership percentage 100.00%   100.00%   100.00%    
Refundable deposits $ 142   $ 142   $ 142   $ 174
Leasehold and property acquisitions     18 99 67 118  
Scottish Area Gas Evacuation System [Member]              
Business Acquisition [Line Items]              
Equity ownership percentage             30.28%
Beryl Pipeline [Member]              
Business Acquisition [Line Items]              
Equity ownership percentage             60.56%
Permian Region [Member]              
Business Acquisition [Line Items]              
Proceeds from sale of non-core assets         522    
Gain on sale of non-core assets         372    
Midale and House Mountain [Member] | Disposed of by sale [Member]              
Business Acquisition [Line Items]              
Loss recognized on sale 52            
Apache Canada Ltd. (ACL) [Member] | Held for sale [Member]              
Business Acquisition [Line Items]              
Currency translation losses recorded in Accumulated Other Comprehensive Loss $ 109   109   109    
Pretax losses from operations     $ 93 $ 62 $ 129 $ 161  
Subsequent Event [Member]              
Business Acquisition [Line Items]              
Proceeds from divestiture   $ 713