Condensed Consolidating Balance Sheet (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 36,675	$ 17,229	$ 18,023	$ 64,994
Accounts receivable	181,939	222,409
Prepaid expenses	12,382	10,182
Other current assets	12,312	8,111
Total current assets	243,308	257,931
Property, plant and equipment
Gathering systems	6,406,548	5,974,940
Other fixed assets	361,933	175,411
Less: Accumulated depreciation	(999,219)	(859,551)
Total property, plant and equipment, net	5,769,262	5,290,800
Investments in unconsolidated affiliates	2,103,530	1,936,603
Intangible customer relationships, net	360,502	372,391
Deferred loan costs, net	64,061	59,721
Total assets	8,540,663	7,917,446	7,216,570
Current liabilities:
Accounts payable	63,649	37,520
Accrued liabilities	272,555	268,952
Total current liabilities	336,204	306,472
Long-term liabilities
Long-term debt	3,805,397	3,249,230
Other liabilities	9,269	8,954
Total long-term liabilities	3,814,666	3,258,184
Partners' capital
Total partners' capital attributable to Access Midstream Partners, L.P.	4,031,003	4,098,906
Noncontrolling interest	358,790	253,884
Total partners' capital	4,389,793	4,352,790
Total liabilities and partners' capital	8,540,663	7,917,446
Eliminations
Property, plant and equipment
Investments in unconsolidated affiliates	(3,764,470)	(3,455,590)
Intercompany receivable from parent	(4,416,341)	(3,905,726)
Total assets	(8,180,811)	(7,361,316)
Current liabilities:
Intercompany payable to parent	(7,681)	(23,435)
Total current liabilities	(7,681)	(23,435)
Long-term liabilities
Intercompany payable to parent	(4,408,660)	(3,882,290)
Total long-term liabilities	(4,408,660)	(3,882,290)
Partners' capital
Total partners' capital attributable to Access Midstream Partners, L.P.	(4,123,260)	(3,709,475)
Noncontrolling interest	358,790	253,884
Total partners' capital	(3,764,470)	(3,455,591)
Total liabilities and partners' capital	(8,180,811)	(7,361,316)
Parent | Reportable Legal Entities
Property, plant and equipment
Investments in unconsolidated affiliates	3,225,723	3,076,205
Intercompany receivable from parent	4,408,660	3,882,291
Deferred loan costs, net	52,017	46,140
Total assets	7,686,400	7,004,636
Long-term liabilities
Long-term debt	3,655,397	2,905,730
Total long-term liabilities	3,655,397	2,905,730
Partners' capital
Total partners' capital attributable to Access Midstream Partners, L.P.	4,031,003	4,098,906
Total partners' capital	4,031,003	4,098,906
Total liabilities and partners' capital	7,686,400	7,004,636
Guarantor Subsidiaries | Reportable Legal Entities
Current assets:
Cash and cash equivalents	8	400		63,216
Accounts receivable	153,556	202,007
Prepaid expenses	12,201	10,182
Other current assets	11,339	7,569
Total current assets	177,104	220,158
Property, plant and equipment
Gathering systems	5,457,491	5,295,771
Other fixed assets	361,800	175,397
Less: Accumulated depreciation	(975,412)	(845,892)
Total property, plant and equipment, net	4,843,879	4,625,276
Investments in unconsolidated affiliates	2,642,277	2,315,988
Intangible customer relationships, net	360,502	372,391
Intercompany receivable from parent	7,563	3,105
Deferred loan costs, net	12,044	13,581
Total assets	8,043,369	7,550,499
Current liabilities:
Accounts payable	34,236	36,638
Accrued liabilities	215,753	203,099
Total current liabilities	249,989	239,737
Long-term liabilities
Long-term debt	150,000	343,500
Intercompany payable to parent	4,408,660	3,882,290
Other liabilities	8,997	8,767
Total long-term liabilities	4,567,657	4,234,557
Partners' capital
Total partners' capital attributable to Access Midstream Partners, L.P.	3,225,723	3,076,205
Total partners' capital	3,225,723	3,076,205
Total liabilities and partners' capital	8,043,369	7,550,499
Non-Guarantors | Reportable Legal Entities
Current assets:
Cash and cash equivalents	36,667	16,829	18,023	1,778
Accounts receivable	28,383	20,402
Prepaid expenses	181
Other current assets	973	542
Total current assets	66,204	37,773
Property, plant and equipment
Gathering systems	949,057	679,169
Other fixed assets	133	14
Less: Accumulated depreciation	(23,807)	(13,659)
Total property, plant and equipment, net	925,383	665,524
Intercompany receivable from parent	118	20,330
Total assets	991,705	723,627
Current liabilities:
Accounts payable	29,413	882
Accrued liabilities	56,802	65,853
Intercompany payable to parent	7,681	23,435
Total current liabilities	93,896	90,170
Long-term liabilities
Other liabilities	272	187
Total long-term liabilities	272	187
Partners' capital
Total partners' capital attributable to Access Midstream Partners, L.P.	897,537	633,270
Total partners' capital	897,537	633,270
Total liabilities and partners' capital	$ 991,705	$ 723,627