| Document and Entity Information | Mar. 25, 2021 |
| Cover [Abstract] | |
| Entity Registrant Name | Noble Corp |
| Amendment Flag | false |
| Entity Central Index Key | 0001458891 |
| Document Type | 8-K |
| Document Period End Date | Mar. 25, 2021 |
| Entity Incorporation State Country Code | E9 |
| Entity File Number | 001-36211 |
| Entity Tax Identification Number | 98-1575532 |
| Entity Address, Address Line One | 13135 Dairy Ashford |
| Entity Address, Address Line Two | Suite 800 |
| Entity Address, City or Town | Sugar Land |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 77478 |
| City Area Code | 281 |
| Local Phone Number | 276-6100 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
