| Cover | Oct. 14, 2019 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Amendment Description | The sole purpose of this amendment to the Current Report on Form 8-K/A (this "Form 8-K/A"), filed by Jagged Peak Energy Inc. (the "Company") with the Securities and Exchange Commission on October 15, 2019 (the "Form 8-K"), is to add Inline eXtensible Business Reporting Language ("XBRL") tagging to the cover page of this Form 8-K/A and to furnish Exhibit 104 to this Form 8-K/A relating to the same. |
| Document Period End Date | Oct. 14, 2019 |
| Entity File Number | 001-37995 |
| Entity Registrant Name | Jagged Peak Energy Inc. |
| Entity Central Index Key | 0001685715 |
| Entity Tax Identification Number | 81-3943703 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 1401 Lawrence Street |
| Entity Address, Address Line Two | Suite 1800 |
| Entity Address, City or Town | Denver |
| Entity Address, State or Province | CO |
| Entity Address, Postal Zip Code | 80202 |
| City Area Code | 720 |
| Local Phone Number | 215-3700 |
| Written Communications | true |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, par value $0.01 per share |
| Trading Symbol | JAG |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
