Acquisitions, Divestitures, and Assets Held for Sale	3 Months Ended
Mar. 31, 2015
Property, Plant and Equipment [Abstract]
Acquisitions, Divestitures, and Assets Held for Sale	2. Acquisitions, Divestitures, and Assets Held for Sale In November 2014, Western Gas Partners, LP (WES) 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 still preliminary as of March 31, 2015, pending final review of support related to the acquired entity’s assets. 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. 2. Acquisitions, Divestitures, and Assets Held for Sale (Continued) For the three months ended March 31, 2015, the Company recognized net losses on divestitures of $334 million related to assets included in the oil and gas exploration and production reporting segment. During the first quarter of 2015, certain U.S. onshore assets in the Rocky Mountains Region (Rockies) satisfied criteria to be considered held for sale. These assets were remeasured to their current fair value using a market approach and Level 2 fair-value measurement, and the Company recognized a loss of $340 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. At March 31, 2015, the Company’s Consolidated Balance Sheet included current assets of $29 million, long-term assets of $743 million, current liabilities of $17 million, and long-term liabilities of $78 million associated with assets held for sale. The sale of these assets closed in April 2015 for proceeds of $703 million.

2. Acquisitions, Divestitures, and Assets Held for Sale

In November 2014, Western Gas Partners, LP (WES) 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 still preliminary as of March 31, 2015, pending final review of support related to the acquired entity’s assets. 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.

2. Acquisitions, Divestitures, and Assets Held for Sale (Continued)

For the three months ended March 31, 2015, the Company recognized net losses on divestitures of $334 million related to assets included in the oil and gas exploration and production reporting segment. During the first quarter of 2015, certain U.S. onshore assets in the Rocky Mountains Region (Rockies) satisfied criteria to be considered held for sale. These assets were remeasured to their current fair value using a market approach and Level 2 fair-value measurement, and the Company recognized a loss of $340 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. At March 31, 2015, the Company’s Consolidated Balance Sheet included current assets of $29 million, long-term assets of $743 million, current liabilities of $17 million, and long-term liabilities of $78 million associated with assets held for sale. The sale of these assets closed in April 2015 for proceeds of $703 million.