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Organization and Nature of Operations	9 Months Ended
Organization and Nature of Operations	Sep. 30, 2011
Notes to Financial Statements [Abstract]
Organization and Nature of Operations	Note 1. Organization and Nature of Operations Noble Energy, Inc. (Noble Energy, we or us) is a leading independent energy company engaged in worldwide crude oil and natural gas exploration and production. Our key operating areas are onshore in the US, primarily in the DJ Basin and the Marcellus shale, in the deepwater Gulf of Mexico, offshore Eastern Mediterranean, and offshore West Africa.