Document And Entity Information
9 Months Ended
Sep. 30, 2018
Document And Entity Information [Abstract]  
Entity Registrant Name NOBLE ENERGY INC
Entity Central Index Key 0000072207
Current Fiscal Year End Date --12-31
Entity Filer Category Large Accelerated Filer
Entity Emerging Growth Company false
Entity Small Business false
Entity Common Stock, Shares Outstanding 479,799,000
Document Fiscal Year Focus 2018
Document Fiscal Period Focus Q3
Document Type 10-Q
Amendment Flag false
Document Period End Date Sep. 30, 2018