Condensed Consolidating Balance Sheet (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 89,510	$ 17,229	$ 312	$ 64,994
Accounts receivable	178,486	222,409
Intercompany receivable from parent
Prepaid expenses	14,997	10,182
Other current assets	15,332	8,111
Total current assets	298,325	257,931
Property, plant and equipment:
Gathering systems	6,230,163	5,974,940
Other fixed assets	350,971	175,411
Less: Accumulated depreciation	(938,464)	(859,551)
Total property, plant and equipment, net	5,642,670	5,290,800
Investments in unconsolidated affiliates	1,976,052	1,936,603
Intangible customer relationships, net	366,446	372,391
Deferred loan costs, net	65,620	59,721
Total assets	8,349,113	7,917,446	6,851,414
Current liabilities:
Accounts payable	31,716	37,520
Accrued liabilities	295,993	268,952
Intercompany payable to parent
Total current liabilities	327,709	306,472
Long-term liabilities:
Long-term debt	3,655,565	3,249,230
Intercompany payable to parent
Other liabilities	9,583	8,954
Total long-term liabilities	3,665,148	3,258,184
Partners’ capital:
Total partners’ capital attributable to Access Midstream Partners, L.P.	4,044,624	4,098,906
Noncontrolling interest	311,632	253,884
Total partners’ capital	4,356,256	4,352,790
Total liabilities and partners’ capital	8,349,113	7,917,446
Eliminations
Current assets:
Cash and cash equivalents
Accounts receivable
Intercompany receivable from parent	(4,516,455)	(3,905,726)
Prepaid expenses
Other current assets
Total current assets	(4,516,455)	(3,905,726)
Property, plant and equipment:
Gathering systems
Other fixed assets
Less: Accumulated depreciation
Total property, plant and equipment, net
Investments in unconsolidated affiliates	(3,610,546)	(3,455,590)
Intangible customer relationships, net
Deferred loan costs, net
Total assets	(8,127,001)	(7,361,316)
Current liabilities:
Accounts payable
Accrued liabilities
Intercompany payable to parent	(5,458)	(23,435)
Total current liabilities	(5,458)	(23,435)
Long-term liabilities:
Long-term debt
Intercompany payable to parent	(4,510,997)	(3,882,290)
Other liabilities
Total long-term liabilities	(4,510,997)	(3,882,290)
Partners’ capital:
Total partners’ capital attributable to Access Midstream Partners, L.P.	(3,922,178)	(3,709,475)
Noncontrolling interest	311,632	253,884
Total partners’ capital	(3,610,546)	(3,455,591)
Total liabilities and partners’ capital	(8,127,001)	(7,361,316)
Parent | Reportable Legal Entities
Current assets:
Cash and cash equivalents
Accounts receivable
Intercompany receivable from parent	4,510,997	3,882,291
Prepaid expenses
Other current assets
Total current assets	4,510,997	3,882,291
Property, plant and equipment:
Gathering systems
Other fixed assets
Less: Accumulated depreciation
Total property, plant and equipment, net
Investments in unconsolidated affiliates	3,136,389	3,076,205
Intangible customer relationships, net
Deferred loan costs, net	52,803	46,140
Total assets	7,700,189	7,004,636
Current liabilities:
Accounts payable
Accrued liabilities
Intercompany payable to parent
Total current liabilities
Long-term liabilities:
Long-term debt	3,655,565	2,905,730
Intercompany payable to parent
Other liabilities
Total long-term liabilities	3,655,565	2,905,730
Partners’ capital:
Total partners’ capital attributable to Access Midstream Partners, L.P.	4,044,624	4,098,906
Noncontrolling interest
Total partners’ capital	4,044,624	4,098,906
Total liabilities and partners’ capital	7,700,189	7,004,636
Guarantor Subsidiaries | Reportable Legal Entities
Current assets:
Cash and cash equivalents	39,802	400		63,216
Accounts receivable	154,131	202,007
Intercompany receivable from parent	5,080	3,105
Prepaid expenses	14,983	10,182
Other current assets	13,452	7,569
Total current assets	227,448	223,263
Property, plant and equipment:
Gathering systems	5,420,833	5,295,771
Other fixed assets	350,971	175,397
Less: Accumulated depreciation	(920,162)	(845,892)
Total property, plant and equipment, net	4,851,642	4,625,276
Investments in unconsolidated affiliates	2,450,209	2,315,988
Intangible customer relationships, net	366,446	372,391
Deferred loan costs, net	12,817	13,581
Total assets	7,908,562	7,550,499
Current liabilities:
Accounts payable	21,871	36,638
Accrued liabilities	229,931	203,099
Intercompany payable to parent
Total current liabilities	251,802	239,737
Long-term liabilities:
Long-term debt		343,500
Intercompany payable to parent	4,510,997	3,882,290
Other liabilities	9,374	8,767
Total long-term liabilities	4,520,371	4,234,557
Partners’ capital:
Total partners’ capital attributable to Access Midstream Partners, L.P.	3,136,389	3,076,205
Noncontrolling interest
Total partners’ capital	3,136,389	3,076,205
Total liabilities and partners’ capital	7,908,562	7,550,499
Non-Guarantor Subsidiaries | Reportable Legal Entities
Current assets:
Cash and cash equivalents	49,708	16,829	312	1,778
Accounts receivable	24,355	20,402
Intercompany receivable from parent	378	20,330
Prepaid expenses	14
Other current assets	1,880	542
Total current assets	76,335	58,103
Property, plant and equipment:
Gathering systems	809,330	679,169
Other fixed assets		14
Less: Accumulated depreciation	(18,302)	(13,659)
Total property, plant and equipment, net	791,028	665,524
Investments in unconsolidated affiliates
Intangible customer relationships, net
Deferred loan costs, net
Total assets	867,363	723,627
Current liabilities:
Accounts payable	9,845	882
Accrued liabilities	66,062	65,853
Intercompany payable to parent	5,458	23,435
Total current liabilities	81,365	90,170
Long-term liabilities:
Long-term debt
Intercompany payable to parent
Other liabilities	209	187
Total long-term liabilities	209	187
Partners’ capital:
Total partners’ capital attributable to Access Midstream Partners, L.P.	785,789	633,270
Noncontrolling interest
Total partners’ capital	785,789	633,270
Total liabilities and partners’ capital	$ 867,363	$ 723,627