Document And Entity Information
3 Months Ended
Mar. 31, 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 Common Stock, Shares Outstanding 484,440,673
Document Fiscal Year Focus 2018
Document Fiscal Period Focus Q1
Document Type 10-Q
Amendment Flag false
Document Period End Date Mar. 31, 2018