Condensed Consolidating Statement of Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues	$ 313,849	$ 260,943	$ 883,861	$ 745,144
Operating expenses
Operating expenses	116,652	83,533	307,088	249,140
Depreciation and amortization expense	66,454	77,086	241,974	215,605
General and administrative expense	84,657	24,470	156,094	73,293
Other operating expense (income)	2,799	(239)	4,287	1,744
Total operating expenses	270,562	184,850	709,443	539,782
Operating income	43,287	76,093	174,418	205,362
Other income (expense)
Income from unconsolidated affiliates	53,067	32,835	144,008	91,588
Interest expense	(44,353)	(28,600)	(125,829)	(83,394)
Other income	212	236	802	631
Income before income tax expense	52,213	80,564	193,399	214,187
Income tax expense	311	1,353	3,500	3,853
Net income	51,902	79,211	189,899	210,334
Net income attributable to noncontrolling interests	10,684	994	20,149	3,366
Net income attributable to Access Midstream Partners, L.P.	41,218	78,217	169,750	206,968
Eliminations
Other income (expense)
Income from unconsolidated affiliates	(105,245)	(109,514)	(332,466)	(297,744)
Income before income tax expense	(105,245)	(109,514)	(332,466)	(297,744)
Net income	(105,245)	(109,514)	(332,466)	(297,744)
Net income attributable to noncontrolling interests	10,684	994	20,149	3,366
Net income attributable to Access Midstream Partners, L.P.	(115,929)	(110,508)	(352,615)	(301,110)
Parent | Reportable Legal Entities
Other income (expense)
Income from unconsolidated affiliates	85,583	106,824	295,591	290,382
Interest expense	(44,368)	(28,607)	(125,844)	(83,413)
Income before income tax expense	41,215	78,217	169,747	206,969
Net income	41,215	78,217	169,747	206,969
Net income attributable to Access Midstream Partners, L.P.	41,215	78,217	169,747	206,969
Guarantor Subsidiaries | Reportable Legal Entities
Revenues	262,423	242,082	761,873	709,322
Operating expenses
Operating expenses	103,592	72,822	263,802	233,333
Depreciation and amortization expense	61,095	73,835	226,417	208,209
General and administrative expense	81,943	23,412	149,823	71,532
Other operating expense (income)	2,799	(437)	4,327	1,546
Total operating expenses	249,429	169,632	644,369	514,620
Operating income	12,994	72,450	117,504	194,702
Other income (expense)
Income from unconsolidated affiliates	72,729	35,525	180,883	98,950
Other income	170	204	703	585
Income before income tax expense	85,893	108,179	299,090	294,237
Income tax expense	311	1,353	3,500	3,853
Net income	85,582	106,826	295,590	290,384
Net income attributable to Access Midstream Partners, L.P.	85,582	106,826	295,590	290,384
Non-Guarantors | Reportable Legal Entities
Revenues	51,426	18,861	121,988	35,822
Operating expenses
Operating expenses	13,060	10,711	43,286	15,807
Depreciation and amortization expense	5,359	3,251	15,557	7,396
General and administrative expense	2,714	1,058	6,271	1,761
Other operating expense (income)		198	(40)	198
Total operating expenses	21,133	15,218	65,074	25,162
Operating income	30,293	3,643	56,914	10,660
Other income (expense)
Interest expense	15	7	15	19
Other income	42	32	99	46
Income before income tax expense	30,350	3,682	57,028	10,725
Net income	30,350	3,682	57,028	10,725
Net income attributable to Access Midstream Partners, L.P.	$ 30,350	$ 3,682	$ 57,028	$ 10,725