Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 19,963	$ 64,994
Accounts receivable	164,834	133,543
Prepaid expenses	12,612	13,978
Other current assets	7,282	7,251
Total current assets	204,691	219,766
Property, plant and equipment:
Gathering systems	5,745,115	5,125,746
Other fixed assets	139,468	96,916
Less: Accumulated depreciation	(785,354)	(590,614)
Total property, plant and equipment, net	5,099,229	4,632,048
Investment in unconsolidated affiliates	1,827,448	1,297,811
Intangible customer relationships, net	379,258	355,217
Deferred loan costs, net	61,466	56,258
Total assets	7,572,092	6,561,100
Current liabilities:
Accounts payable	35,418	47,987
Accrued liabilities	266,956	211,274
Total current liabilities	302,374	259,261
Long-term liabilities:
Long-term debt	3,010,693	2,500,000
Other liabilities	7,853	5,333
Total long-term liabilities	3,018,546	2,505,333
Commitments and contingencies (Note 8)
Partners’ capital:
General partner interest	109,236	93,182
Total partners’ capital attributable to Access Midstream Partners, L.P.	4,030,242	3,684,833
Noncontrolling interest	220,930	111,673
Total partners’ capital	4,251,172	3,796,506
Total liabilities and partners’ capital	7,572,092	6,561,100
Common Units
Partners’ capital:
Limited partner units	3,301,396	2,188,241
Subordinated Units
Partners’ capital:
Limited partner units		834,001
Convertible Class B Units
Partners’ capital:
Limited partner units	305,103	273,858
Subordinated Class C Units
Partners’ capital:
Limited partner units	$ 314,507	$ 295,551