Description of Business and Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2014
Organization	Organization Access Midstream Partners, L.P. (the “Partnership”), a Delaware limited partnership formed in January 2010, is principally focused on natural gas gathering, the first segment of midstream energy infrastructure that connects natural gas produced at the wellhead to third-party takeaway pipelines. The Partnership is the industry’s largest gathering and processing master limited partnership as measured by throughput volume. The Partnership’s assets are located in Arkansas, Kansas, Louisiana, Ohio, Oklahoma, Pennsylvania, Texas, West Virginia and Wyoming. The Partnership provides gathering, treating and compression services to Chesapeake Energy Corporation (“Chesapeake”), Total Gas and Power North America, Inc. and Total E&P USA, Inc., a wholly owned subsidiary of Total, S.A. (“Total”), Statoil ASA (“Statoil”), Anadarko Petroleum Corporation (“Anadarko”), Mitsui & Co., Ltd. (“Mitsui”) and other producers under long-term, fixed-fee contracts. For purposes of these financial statements, the “GIP II Entities” refers to certain entities affiliated with Global Infrastructure Investors II, LLC, collectively. “Williams” refers to The Williams Companies, Inc. (NYSE: WMB).
Acquisition	Williams Acquisition At June 30, 2014, the GIP II Entities held 2,068,692 notional general partner units representing a 1.0 percent general partner interest in the Partnership, 50.0 percent of the Partnership’s incentive distribution rights, 48,742,361 common units and 6,340,022 Class B units. At June 30, 2014, The GIP II Entities’ ownership represented an aggregate 26.6 percent limited partner interest in the Partnership. At June 30, 2014, Williams held 2,068,692 notional general partner units representing a 1.0 percent general partner interest in the Partnership, 50.0 percent of the Partnership’s incentive distribution rights, 40,137,695 common units and 6,340,022 Class B units. At June 30, 2014, Williams ownership represented an aggregate 22.5 percent limited partner interest in the Partnership. The public held 101,171,762 common units, representing a 48.9 percent limited partner interest in the Partnership. On July 1, 2014, Williams acquired all of the interests in the Partnership and Access Midstream Ventures, L.L.C., the sole member of Access Midstream Partners GP, L.L.C. (the “General Partner”), that were owned by the GIP II Entities (the “Williams Acquisition”). As a result of the Williams Acquisition, Williams owns 100% of the General Partner. The GIP II Entities no longer have any ownership interest in the Partnership or the General Partner. Please read Note 12 (Subsequent Events) to the condensed consolidated financial statements for information regarding the acquisition. MidCon Acquisition On March 31, 2014, the Partnership acquired certain midstream compression assets from MidCon Compression, L.L.C. (“MidCon”), a wholly owned subsidiary of Chesapeake, for approximately $160 million. The acquisition added natural gas compression assets, historically leased from MidCon, in the rapidly growing Utica Shale and Marcellus Shale regions. The acquired assets include more than 100 compression units with a combined capacity of approximately 200,000 horsepower. Equity Issuances On August 2, 2013, the Partnership entered into an Equity Distribution Agreement (“ATM”) under which it may offer and sell common units, in amounts, at prices and on terms to be determined by market conditions and other factors, having an aggregate market value of up to $300 million. The Partnership is under no obligation to issue equity under the ATM. For the three-month period ended June 30, 2014, the Partnership sold an aggregate of 772,819 common units under the ATM for net proceeds of approximately $44.6 million, net of approximately $0.4 million in commissions, plus an approximate $0.9 million capital contribution from the Partnership’s general partner to maintain its two percent general partner interest. For the six-month period ended June 30, 2014, the Partnership sold an aggregate of 909,219 common units under the ATM for net proceeds of approximately $52.2 million, net of approximately $0.5 million in commissions, plus an approximate $1.0 million capital contribution from the Partnership’s general partner to maintain its two percent general partner interest. The Partnership used the proceeds for general partnership purposes. On April 2, 2013, the Partnership completed an equity offering of 10.35 million common units, including 1.35 million common units issued pursuant to the underwriters’ exercise of their option to purchase additional common units, at a price of $39.86 per common unit. The Partnership received offering proceeds (net of underwriting discounts and commissions) of $399.8 million from the equity offering, including proceeds from the underwriters’ exercise of their option to purchase additional common units, plus an approximate $8.4 million capital contribution from the Partnership’s general partner to maintain its two percent general partner interest. The proceeds were used for general partnership purposes, including repayment of amounts outstanding under the Partnership’s revolving credit facility.
Basis of Presentation	Basis of Presentation The accompanying financial statements and related notes present the unaudited condensed consolidated balance sheets of the Partnership as of June 30, 2014 and December 31, 2013. They also include the unaudited condensed consolidated statements of operations for the three and six-month periods ended June 30, 2014 and 2013, the unaudited condensed consolidated statements of cash flows for the Partnership for the six-month periods ended June 30, 2014 and 2013, and the unaudited changes in partners’ capital of the Partnership for the six-month period ended June 30, 2014. The accompanying condensed consolidated financial statements were prepared using accounting principles generally accepted in the United States (“GAAP”) for interim financial information and in accordance with the rules and regulations of the Securities and Exchange Commission (“SEC”). In the opinion of management, the interim data includes all adjustments, consisting only of normal recurring adjustments, necessary to a fair statement of the results for the interim periods. Certain footnote disclosures normally included in the financial statements prepared in accordance with GAAP have been appropriately condensed or omitted in this quarterly report on Form 10-Q (this “Form 10-Q”). Management believes the disclosures made are adequate to make the information presented not misleading. This Form 10-Q should be read together with the Partnership’s annual report on Form 10-K for the year ended December 31, 2013, as amended. The results of operations for the six-month period ended June 30, 2014, are not indicative of results that may be expected for the full fiscal year.
Income Taxes	Income Taxes As a master limited partnership, the Partnership is a pass-through entity and is not subject to federal income taxes and most state income taxes with the exception of Texas Franchise Tax. For federal and state income tax purposes, all income, expenses, gains, losses and tax credits generated flow through to the owners, and accordingly, do not result in a provision for income taxes.

Disclosure of accounting policy for completed business combinations (purchase method, acquisition method or combination of entities under common control). This accounting policy may include a general discussion of the purchase method or acquisition method of accounting (including for example, the treatment accorded contingent consideration, the identification of assets and liabilities, the purchase price allocation process, how the fair values of acquired assets and liabilities are determined) and the entity's specific application thereof. An entity that acquires another entity in a leveraged buyout transaction generally discloses the accounting policy followed by the acquiring entity in determining the basis used to value its interest in the acquired entity, and the rationale for that accounting policy.

+ References+ Details