Supplemental Guarantor Information - Statement of Operations (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
REVENUES AND OTHER:
Oil and Gas Production Revenues	$ 1,346	$ 1,386	$ 2,858	$ 2,473
Equity in net income (loss) of affiliates	0	0	0	0
Other	59	(21)	84	(24)
Gain (loss) on divestiture	(21)	17	320	16
Total revenues and other	1,384	1,382	3,262	2,465
OPERATING EXPENSES:
Lease operating expenses	372	359	708	737
Gathering and transportation	48	52	105	104
Taxes other than income	29	65	71	76
Exploration	108	91	200	186
General and administrative	106	103	209	196
Transaction, reorganization, and separation	4	9	(6)	24
Depreciation, depletion, and amortization	572	669	1,148	1,347
Asset retirement obligation accretion	37	38	73	76
Impairments	0	173	8	173
Financing costs, net	99	104	199	209
Total operating expenses	1,375	1,663	2,715	3,128
NET INCOME (LOSS) BEFORE INCOME TAXES	9	(281)	547	(663)
Provision (benefit) for income taxes	(604)	(81)	(333)	(92)
NET INCOME (LOSS) INCLUDING NONCONTROLLING INTEREST	613	(200)	880	(571)
Net income attributable to noncontrolling interest	41	44	95	45
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	572	(244)	785	(616)
Reclassifications & Eliminations [Member]
REVENUES AND OTHER:
Oil and Gas Production Revenues	0	0	0	0
Equity in net income (loss) of affiliates	60	70	(161)	204
Other	0	0	0	0
Gain (loss) on divestiture	0	0	0	0
Total revenues and other	60	70	(161)	204
OPERATING EXPENSES:
Lease operating expenses	0	0	0	0
Gathering and transportation	0	0	0	0
Taxes other than income	0	0	0	0
Exploration	0	0	0	0
General and administrative	0	0	0	0
Transaction, reorganization, and separation	0	0	0	0
Depreciation, depletion, and amortization	0	0	0	0
Asset retirement obligation accretion	0	0	0	0
Impairments		0	0	0
Financing costs, net	0	0	0	0
Total operating expenses	0	0	0	0
NET INCOME (LOSS) BEFORE INCOME TAXES	60	70	(161)	204
Provision (benefit) for income taxes	0	0	0	0
NET INCOME (LOSS) INCLUDING NONCONTROLLING INTEREST	60	70	(161)	204
Net income attributable to noncontrolling interest	0	0	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	60	70	(161)	204
Apache Corporation [Member]
REVENUES AND OTHER:
Oil and Gas Production Revenues	248	270	532	487
Equity in net income (loss) of affiliates	(34)	(76)	188	(184)
Other	62	(22)	70	6
Gain (loss) on divestiture	34	(1)	175	(2)
Total revenues and other	310	171	965	307
OPERATING EXPENSES:
Lease operating expenses	79	66	160	144
Gathering and transportation	7	10	14	19
Taxes other than income	24	22	47	43
Exploration	54	76	82	126
General and administrative	91	86	181	163
Transaction, reorganization, and separation	4	9	(6)	24
Depreciation, depletion, and amortization	130	159	265	315
Asset retirement obligation accretion	5	5	11	9
Impairments		61	0	61
Financing costs, net	60	64	120	125
Total operating expenses	454	558	874	1,029
NET INCOME (LOSS) BEFORE INCOME TAXES	(144)	(387)	91	(722)
Provision (benefit) for income taxes	(716)	(143)	(694)	(106)
NET INCOME (LOSS) INCLUDING NONCONTROLLING INTEREST	572	(244)	785	(616)
Net income attributable to noncontrolling interest	0	0	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	572	(244)	785	(616)
Apache Finance Canada [Member]
REVENUES AND OTHER:
Oil and Gas Production Revenues	0	0	0	0
Equity in net income (loss) of affiliates	(26)	6	(27)	(20)
Other	8	9	16	21
Gain (loss) on divestiture	0	0	0	0
Total revenues and other	(18)	15	(11)	1
OPERATING EXPENSES:
Lease operating expenses	0	0	0	0
Gathering and transportation	0	0	0	0
Taxes other than income	0	0	0	0
Exploration	0	0	0	0
General and administrative	0	0	0	0
Transaction, reorganization, and separation	0	0	0	0
Depreciation, depletion, and amortization	0	0	0	0
Asset retirement obligation accretion	0	0	0	0
Impairments		0	0	0
Financing costs, net	6	7	12	17
Total operating expenses	6	7	12	17
NET INCOME (LOSS) BEFORE INCOME TAXES	(24)	8	(23)	(16)
Provision (benefit) for income taxes	2	2	4	4
NET INCOME (LOSS) INCLUDING NONCONTROLLING INTEREST	(26)	6	(27)	(20)
Net income attributable to noncontrolling interest	0	0	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	(26)	6	(27)	(20)
All Other Subsidiaries of Apache Corporation [Member]
REVENUES AND OTHER:
Oil and Gas Production Revenues	1,098	1,116	2,326	1,986
Equity in net income (loss) of affiliates	0	0	0	0
Other	(11)	(8)	(2)	(51)
Gain (loss) on divestiture	(55)	18	145	18
Total revenues and other	1,032	1,126	2,469	1,953
OPERATING EXPENSES:
Lease operating expenses	293	293	548	593
Gathering and transportation	41	42	91	85
Taxes other than income	5	43	24	33
Exploration	54	15	118	60
General and administrative	15	17	28	33
Transaction, reorganization, and separation	0	0	0	0
Depreciation, depletion, and amortization	442	510	883	1,032
Asset retirement obligation accretion	32	33	62	67
Impairments		112	8	112
Financing costs, net	33	33	67	67
Total operating expenses	915	1,098	1,829	2,082
NET INCOME (LOSS) BEFORE INCOME TAXES	117	28	640	(129)
Provision (benefit) for income taxes	110	60	357	10
NET INCOME (LOSS) INCLUDING NONCONTROLLING INTEREST	7	(32)	283	(139)
Net income attributable to noncontrolling interest	41	44	95	45
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	$ (34)	$ (76)	$ 188	$ (184)