Supplemental Guarantor Information - Supplemental Condensed Consolidating Balance Sheet (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
CURRENT ASSETS:
Cash and cash equivalents	$ 1,655	$ 769	$ 510	$ 1,906
Receivables, net of allowance	1,332	2,024
Inventories	667	708
Drilling advances	186	388
Assets held for sale	79	1,628
Deferred tax asset	84	769
Prepaid assets and other	76	129
Total current assets	4,079	6,415
PROPERTY AND EQUIPMENT, NET	22,377	48,076
OTHER ASSETS:
Goodwill		87
Deferred charges and other	1,356	1,461
Total assets	27,812	55,952	52,340
CURRENT LIABILITIES:
Accounts payable	659	1,210
Asset retirement obligation	28	37
Other current liabilities	1,508	2,454
Total current liabilities	2,167	3,664
LONG-TERM DEBT	8,777	11,245
DEFERRED CREDITS AND OTHER NONCURRENT LIABILITIES:
Income taxes	1,997	9,499
Asset retirement obligation	2,567	3,048
Other	332	359
Total deferred credits and other noncurrent liabilities	$ 4,896	$ 12,906
COMMITMENTS AND CONTINGENCIES
APACHE SHAREHOLDERS' EQUITY	$ 9,809	$ 25,937
Noncontrolling interest	2,163	2,200
TOTAL EQUITY	11,972	28,137	32,986	35,393
Total liabilities and shareholders' equity	27,812	55,952
Reclassifications & Eliminations [Member]
CURRENT ASSETS:
Intercompany receivable	(5,580)	(4,939)
Total current assets	(5,580)	(4,939)
OTHER ASSETS:
Intercompany receivable	(882)	(608)
Equity in affiliates	(19,733)	(27,104)
Deferred charges and other	(1,000)	(1,000)
Total assets	(27,195)	(33,651)
CURRENT LIABILITIES:
Intercompany payable	(5,580)	(4,939)
Total current liabilities	(5,580)	(4,939)
DEFERRED CREDITS AND OTHER NONCURRENT LIABILITIES:
Intercompany payable	(882)	(608)
Other	(1,000)	(1,000)
Total deferred credits and other noncurrent liabilities	$ (1,882)	$ (1,608)
COMMITMENTS AND CONTINGENCIES
APACHE SHAREHOLDERS' EQUITY	$ (19,733)	$ (27,104)
TOTAL EQUITY	(19,733)	(27,104)
Total liabilities and shareholders' equity	(27,195)	(33,651)
Apache Corporation [Member]
CURRENT ASSETS:
Cash and cash equivalents	451	267	20	155
Receivables, net of allowance	392	837
Inventories	35	24
Drilling advances	17	34
Assets held for sale	79
Deferred tax asset	72	612
Prepaid assets and other	19	32
Intercompany receivable	5,580	4,939
Total current assets	6,645	6,745
PROPERTY AND EQUIPMENT, NET	1,156	13,940
OTHER ASSETS:
Equity in affiliates	19,993	25,791
Deferred charges and other	157	175
Total assets	27,951	46,651
CURRENT LIABILITIES:
Accounts payable	416	748
Asset retirement obligation		28
Other current liabilities	851	1,014
Total current liabilities	1,267	1,790
LONG-TERM DEBT	8,480	10,947
DEFERRED CREDITS AND OTHER NONCURRENT LIABILITIES:
Intercompany payable	882	608
Income taxes	109	5,076
Asset retirement obligation	225	211
Other	7,179	2,082
Total deferred credits and other noncurrent liabilities	$ 8,395	$ 7,977
COMMITMENTS AND CONTINGENCIES
APACHE SHAREHOLDERS' EQUITY	$ 9,809	$ 25,937
TOTAL EQUITY	9,809	25,937
Total liabilities and shareholders' equity	27,951	46,651
Apache Finance Canada [Member]
CURRENT ASSETS:
Cash and cash equivalents				3
Drilling advances		1
Total current assets		1
OTHER ASSETS:
Equity in affiliates	(702)	869
Deferred charges and other	998	1,002
Total assets	296	1,872
CURRENT LIABILITIES:
Accounts payable		10
Other current liabilities	8	1
Total current liabilities	8	11
LONG-TERM DEBT	298	298
DEFERRED CREDITS AND OTHER NONCURRENT LIABILITIES:
Other	250	250
Total deferred credits and other noncurrent liabilities	$ 250	$ 250
COMMITMENTS AND CONTINGENCIES
APACHE SHAREHOLDERS' EQUITY	$ (260)	$ 1,313
TOTAL EQUITY	(260)	1,313
Total liabilities and shareholders' equity	296	1,872
All Other Subsidiaries of Apache Corporation [Member]
CURRENT ASSETS:
Cash and cash equivalents	1,204	502	$ 490	$ 1,748
Receivables, net of allowance	940	1,187
Inventories	632	684
Drilling advances	169	353
Assets held for sale		1,628
Deferred tax asset	12	157
Prepaid assets and other	57	97
Total current assets	3,014	4,608
PROPERTY AND EQUIPMENT, NET	21,221	34,136
OTHER ASSETS:
Intercompany receivable	882	608
Equity in affiliates	442	444
Goodwill		87
Deferred charges and other	1,201	1,197
Total assets	26,760	41,080
CURRENT LIABILITIES:
Accounts payable	243	452
Asset retirement obligation		9
Other current liabilities	649	1,402
Intercompany payable	5,580	4,939
Total current liabilities	6,472	6,802
LONG-TERM DEBT	(1)
DEFERRED CREDITS AND OTHER NONCURRENT LIABILITIES:
Income taxes	1,888	4,423
Asset retirement obligation	2,342	2,837
Other	(6,097)	(973)
Total deferred credits and other noncurrent liabilities	$ (1,867)	$ 6,287
COMMITMENTS AND CONTINGENCIES
APACHE SHAREHOLDERS' EQUITY	$ 19,993	$ 25,791
Noncontrolling interest	2,163	2,200
TOTAL EQUITY	22,156	27,991
Total liabilities and shareholders' equity	$ 26,760	$ 41,080