Cover
Cover - shares | 9 Months Ended | |
Sep. 30, 2021 | Oct. 29, 2021 | |
Cover [Abstract] | ||
Document Type | 10-Q/A | |
Document Quarterly Report | true | |
Document Period End Date | Sep. 30, 2021 | |
Document Transition Report | false | |
Entity File Number | 1-1513 | |
Entity Registrant Name (tagged on cover) | Marathon Oil Corporation | |
Entity Incorporation, State or Country Code | DE | |
Entity Tax Identification Number | 25-0996816 | |
Entity Address, Address Line One | 990 Town and Country Boulevard, | |
Entity Address, City or Town | Houston, | |
Entity Address, State or Province | TX | |
Entity Address, Postal Zip Code | 77024-2217 | |
City Area Code | (713) | |
Local Phone Number | 629-6600 | |
Title of 12(b) Security | Common Stock, par value $1.00 | |
Trading Symbol | MRO | |
Security Exchange Name | NYSE | |
Entity Current Reporting Status | Yes | |
Entity Interactive Data Current | Yes | |
Entity Filer Category | Large Accelerated Filer | |
Entity Small Business | false | |
Entity Emerging Growth Company | false | |
Entity Shell Company | false | |
Entity Common Stock, Shares Outstanding | 778,536,897 | |
Document Fiscal Period Focus | Q3 | |
Document Fiscal Year Focus | 2021 | |
Amendment Flag | false | |
Entity Central Index Key | 0000101778 | |
Current Fiscal Year End Date | --12-31 |