Supplemental Guarantor Information - Supplemental Condensed Consolidating Balance Sheet (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 510	$ 1,906	$ 1,251	$ 160
Short-term restricted cash	74
Receivables, net of allowance	2,287	2,952
Inventories	713	891
Drilling advances	434	371
Derivative instruments	41	1
Prepaid assets and other	367	246
Intercompany receivable	0
Total current assets	4,426	6,366
PROPERTY AND EQUIPMENT, NET	53,035	52,421
OTHER ASSETS:
Intercompany receivable	0
Equity in affiliates	0
Long-term restricted cash	471
Goodwill, net	1,369	1,369
Deferred charges and other	1,689	1,481
Total assets	60,990	61,637	58,641
CURRENT LIABILITIES:
Accounts payable	1,316	1,616
Current debt	20	53
Asset retirement obligation	177	121
Derivative instruments		299
Other current liabilities	2,794	2,611
Intercompany payable	0
Total current liabilities	4,307	4,700
LONG-TERM DEBT	10,902	9,672
DEFERRED CREDITS AND OTHER NONCURRENT LIABILITIES:
Intercompany payable	0
Income taxes	9,298	8,364
Asset retirement obligation	3,096	3,101
Other	401	407
Total deferred credits and other noncurrent liabilities	12,795	11,872
COMMITMENTS AND CONTINGENCIES
APACHE SHAREHOLDERS' EQUITY	30,818	33,396
Noncontrolling interest	2,168	1,997
TOTAL EQUITY	32,986	35,393	32,981	31,331
Total liabilities and shareholders' equity	60,990	61,637
Reclassifications & Eliminations [Member]
CURRENT ASSETS:
Cash and cash equivalents	0	0
Short-term restricted cash	0
Receivables, net of allowance	0
Inventories	0
Drilling advances	0
Derivative instruments	0
Prepaid assets and other	0
Intercompany receivable	(6,442)	(5,357)
Total current assets	(6,442)	(5,357)
PROPERTY AND EQUIPMENT, NET	0
OTHER ASSETS:
Intercompany receivable	(740)	(1,572)
Equity in affiliates	(27,620)	(26,347)
Long-term restricted cash	0
Goodwill, net	0
Deferred charges and other	(1,000)	(1,000)
Total assets	(35,802)	(34,276)
CURRENT LIABILITIES:
Accounts payable	0
Current debt	0
Asset retirement obligation	0
Other current liabilities	0
Intercompany payable	(6,442)	(5,357)
Total current liabilities	(6,442)	(5,357)
LONG-TERM DEBT	0
DEFERRED CREDITS AND OTHER NONCURRENT LIABILITIES:
Intercompany payable	(740)	(1,572)
Income taxes	0
Asset retirement obligation	0
Other	(1,000)	(1,000)
Total deferred credits and other noncurrent liabilities	(1,740)	(2,572)
COMMITMENTS AND CONTINGENCIES
APACHE SHAREHOLDERS' EQUITY	(27,620)	(26,347)
Noncontrolling interest	0
TOTAL EQUITY	(27,620)	(26,347)
Total liabilities and shareholders' equity	(35,802)	(34,276)
Apache Corporation [Member]
CURRENT ASSETS:
Cash and cash equivalents	20	155	628
Short-term restricted cash	74
Receivables, net of allowance	836	1,043
Inventories	31	48
Drilling advances	25	49
Derivative instruments	41	1
Prepaid assets and other	91	99
Intercompany receivable	6,442	5,357
Total current assets	7,560	6,752
PROPERTY AND EQUIPMENT, NET	17,039	16,092
OTHER ASSETS:
Intercompany receivable	0	1,572
Equity in affiliates	25,975	24,743
Long-term restricted cash	471
Goodwill, net	173	173
Deferred charges and other	221	166
Total assets	51,439	49,498
CURRENT LIABILITIES:
Accounts payable	736	956
Current debt	20
Asset retirement obligation	115	115
Derivative instruments		299
Other current liabilities	1,300	896
Intercompany payable	0
Total current liabilities	2,171	2,266
LONG-TERM DEBT	10,604	9,374
DEFERRED CREDITS AND OTHER NONCURRENT LIABILITIES:
Intercompany payable	740
Income taxes	4,258	3,586
Asset retirement obligation	466	430
Other	2,382	446
Total deferred credits and other noncurrent liabilities	7,846	4,462
COMMITMENTS AND CONTINGENCIES
APACHE SHAREHOLDERS' EQUITY	30,818	33,396
Noncontrolling interest	0
TOTAL EQUITY	30,818	33,396
Total liabilities and shareholders' equity	51,439	49,498
Apache Finance Canada [Member]
CURRENT ASSETS:
Cash and cash equivalents	0	3
Short-term restricted cash	0
Receivables, net of allowance	0
Inventories	0
Drilling advances	1
Derivative instruments	0
Prepaid assets and other	0
Intercompany receivable	0
Total current assets	1	3
PROPERTY AND EQUIPMENT, NET	0
OTHER ASSETS:
Intercompany receivable	0
Equity in affiliates	1,205	1,155
Long-term restricted cash	0
Goodwill, net	0
Deferred charges and other	1,004	1,006
Total assets	2,210	2,164
CURRENT LIABILITIES:
Accounts payable	12	2
Current debt	0
Asset retirement obligation	0
Other current liabilities	5	10
Intercompany payable	0
Total current liabilities	17	12
LONG-TERM DEBT	298	298
DEFERRED CREDITS AND OTHER NONCURRENT LIABILITIES:
Intercompany payable	0
Income taxes	0
Asset retirement obligation	0
Other	250	250
Total deferred credits and other noncurrent liabilities	250	250
COMMITMENTS AND CONTINGENCIES
APACHE SHAREHOLDERS' EQUITY	1,645	1,604
Noncontrolling interest	0
TOTAL EQUITY	1,645	1,604
Total liabilities and shareholders' equity	2,210	2,164
All Other Subsidiaries of Apache Corporation [Member]
CURRENT ASSETS:
Cash and cash equivalents	490	1,748	623	160
Short-term restricted cash	0
Receivables, net of allowance	1,451	1,909
Inventories	682	843
Drilling advances	408	322
Derivative instruments	0
Prepaid assets and other	276	146
Intercompany receivable	0
Total current assets	3,307	4,968
PROPERTY AND EQUIPMENT, NET	35,996	36,329
OTHER ASSETS:
Intercompany receivable	740
Equity in affiliates	440	449
Long-term restricted cash	0
Goodwill, net	1,196	1,196
Deferred charges and other	1,464	1,309
Total assets	43,143	44,251
CURRENT LIABILITIES:
Accounts payable	568	658
Current debt	0	53
Asset retirement obligation	62	6
Other current liabilities	1,489	1,705
Intercompany payable	6,442	5,357
Total current liabilities	8,561	7,779
LONG-TERM DEBT	0
DEFERRED CREDITS AND OTHER NONCURRENT LIABILITIES:
Intercompany payable	0	1,572
Income taxes	5,040	4,778
Asset retirement obligation	2,630	2,671
Other	(1,231)	711
Total deferred credits and other noncurrent liabilities	6,439	9,732
COMMITMENTS AND CONTINGENCIES
APACHE SHAREHOLDERS' EQUITY	25,975	24,743
Noncontrolling interest	2,168	1,997
TOTAL EQUITY	28,143	26,740
Total liabilities and shareholders' equity	$ 43,143	$ 44,251