Acquisitions, Divestitures, and Assets Held for Sale	6 Months Ended
Jun. 30, 2015
Property, Plant and Equipment [Abstract]
Acquisitions, Divestitures, and Assets Held for Sale	2. Acquisitions, Divestitures, and Assets Held for Sale Acquisitions In November 2014, Western Gas Partners, LP (WES), a publicly traded consolidated subsidiary, acquired Nuevo Midstream, LLC (Nuevo) for $1.554 billion. Following the acquisition, WES changed the name of Nuevo to Delaware Basin Midstream, LLC (DBM). The acquisition constitutes a business combination and was accounted for using the acquisition method of accounting. The fair-value measurements of the assets acquired and liabilities assumed at the acquisition date were preliminary as of June 30, 2015, pending final review of certain support related to the acquired entity’s assets and liabilities. There were no material changes to the fair value of assets acquired and liabilities assumed from the amounts included on the Company’s Consolidated Balance Sheet at December 31, 2014. Divestitures and Assets Held for Sale For the six months ended June 30, 2015, the Company received $700 million in proceeds from divestitures and recognized net losses of $425 million primarily related to assets that were included in the oil and gas exploration and production reporting segment. The sale of certain enhanced oil recovery (EOR) assets in the Rocky Mountains Region (Rockies), with an original sales price of $703 million, closed in April 2015 for net proceeds of $686 million after closing adjustments. During the first quarter of 2015, these EOR assets satisfied criteria to be considered held for sale. These assets were remeasured to their then-current fair value using a market approach and Level 2 fair-value measurement, and the Company recognized a loss of $340 million. During the second quarter of 2015, certain U.S. onshore oil and gas exploration and production properties and related midstream assets in East Texas satisfied criteria to be considered held for sale. These assets were remeasured to their fair value using a market approach and Level 2 fair-value measurement, and the Company recognized a loss of $97 million. Gains and losses on assets held for sale are included in gains (losses) on divestitures and other, net in the Company’s Consolidated Statements of Income. The sale of these assets is expected to close in the third quarter of 2015 for a sales price of $440 million, subject to closing adjustments. At June 30, 2015, the Company’s Consolidated Balance Sheet included long-term assets of $440 million associated with assets held for sale.

2. Acquisitions, Divestitures, and Assets Held for Sale

Acquisitions In November 2014, Western Gas Partners, LP (WES), a publicly traded consolidated subsidiary, acquired Nuevo Midstream, LLC (Nuevo) for $1.554 billion. Following the acquisition, WES changed the name of Nuevo to Delaware Basin Midstream, LLC (DBM). The acquisition constitutes a business combination and was accounted for using the acquisition method of accounting. The fair-value measurements of the assets acquired and liabilities assumed at the acquisition date were preliminary as of June 30, 2015, pending final review of certain support related to the acquired entity’s assets and liabilities. There were no material changes to the fair value of assets acquired and liabilities assumed from the amounts included on the Company’s Consolidated Balance Sheet at December 31, 2014.

Divestitures and Assets Held for Sale For the six months ended June 30, 2015, the Company received $700 million in proceeds from divestitures and recognized net losses of $425 million primarily related to assets that were included in the oil and gas exploration and production reporting segment. The sale of certain enhanced oil recovery (EOR) assets in the Rocky Mountains Region (Rockies), with an original sales price of $703 million, closed in April 2015 for net proceeds of $686 million after closing adjustments. During the first quarter of 2015, these EOR assets satisfied criteria to be considered held for sale. These assets were remeasured to their then-current fair value using a market approach and Level 2 fair-value measurement, and the Company recognized a loss of $340 million.

During the second quarter of 2015, certain U.S. onshore oil and gas exploration and production properties and related midstream assets in East Texas satisfied criteria to be considered held for sale. These assets were remeasured to their fair value using a market approach and Level 2 fair-value measurement, and the Company recognized a loss of $97 million. Gains and losses on assets held for sale are included in gains (losses) on divestitures and other, net in the Company’s Consolidated Statements of Income. The sale of these assets is expected to close in the third quarter of 2015 for a sales price of $440 million, subject to closing adjustments. At June 30, 2015, the Company’s Consolidated Balance Sheet included long-term assets of $440 million associated with assets held for sale.