Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 18,023	$ 64,994
Accounts receivable	150,986	133,543
Prepaid expenses	9,065	13,978
Other current assets	10,064	7,251
Total current assets	188,138	219,766
Property, plant and equipment:
Gathering systems	5,586,723	5,125,746
Other fixed assets	122,489	96,916
Less: Accumulated depreciation	(716,980)	(590,614)
Total property, plant and equipment, net	4,992,232	4,632,048
Investment in unconsolidated affiliates	1,635,296	1,297,811
Intangible customer relationships, net	343,751	355,217
Deferred loan costs, net	57,153	56,258
Total assets	7,216,570	6,561,100
Current liabilities:
Accounts payable	37,093	47,987
Accrued liabilities	222,717	211,274
Total current liabilities	259,810	259,261
Long-term liabilities:
Long-term debt	2,716,200	2,500,000
Other liabilities	5,636	5,333
Total long-term liabilities	2,721,836	2,505,333
Commitments and contingencies (Note 7)
Partners’ capital:
General partner interest	103,048	93,182
Total partners’ capital attributable to Access Midstream Partners, L.P.	4,048,748	3,684,833
Noncontrolling interest	186,176	111,673
Total partners’ capital	4,234,924	3,796,506
Total liabilities and partners’ capital	7,216,570	6,561,100
Common Units
Partners’ capital:
Limited partner units	2,531,356	2,188,241
Subordinated Units
Partners’ capital:
Limited partner units	812,182	834,001
Convertible Class B Units
Partners’ capital:
Limited partner units	294,064	273,858
Subordinated Class C Units
Partners’ capital:
Limited partner units	$ 308,098	$ 295,551