Noncontrolling Interests	9 Months Ended
Noncontrolling Interests	Sep. 30, 2013
Disclosure Text Block [Abstract]
Noncontrolling Interests	6. Noncontrolling Interests Western Gas Equity Partners, LP (WGP) is a consolidated subsidiary formed by Anadarko to own partnership interests in WES. At September 30, 2013, Anadarko’s ownership interest in WGP consisted of a 91.0% limited partner interest and the entire general partner interest. WES is a limited partnership formed by Anadarko to own, operate, acquire, and develop midstream assets. During 2013, WES has issued approximately seven million common units to the public, raising net proceeds of $419 million. At September 30, 2013, WGP’s ownership interest in WES consisted of a 43.1% limited partner interest, the entire 2.0% general partner interest, and all WES incentive distribution rights. At September 30, 2013, Anadarko also owned a 0.4% limited partner interest in WES through another subsidiary.

The entire disclosure for noncontrolling interest in consolidated subsidiaries, which could include the name of the subsidiary, the ownership percentage held by the parent, the ownership percentage held by the noncontrolling owners, the amount of the noncontrolling interest, the location of this amount on the balance sheet (when not reported separately), an explanation of the increase or decrease in the amount of the noncontrolling interest, the noncontrolling interest share of the net Income or Loss of the subsidiary, the location of this amount on the income statement (when not reported separately), the nature of the noncontrolling interest such as background information and terms, the amount of the noncontrolling interest represented by preferred stock, a description of the preferred stock, and the dividend requirements of the preferred stock.

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