| Document and Entity Information | Dec. 31, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Document Period End Date | Dec. 31, 2020 |
| Entity Registrant Name | LIBERTY OILFIELD SERVICES INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-38081 |
| Entity Tax Identification Number | 81-4891595 |
| Entity Address, Address Line One | 950 17th Street |
| Entity Address, Address Line Two | Suite 2400 |
| Entity Address, City or Town | Denver |
| Entity Address, State or Province | CO |
| Entity Address, Postal Zip Code | 80202 |
| City Area Code | 303 |
| Local Phone Number | 515-2800 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A common stock, par value $0.01 per share |
| Trading Symbol | LBRT |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Amendment Description | As reported in a Current Report on Form 8-K filed with the Securities and Exchange Commission by Liberty Oilfield Services Inc., a Delaware corporation (the “Company”), on January 4, 2021 (the “Original Liberty Form 8-K”), on December 31, 2020, the Company, Liberty Oilfield Services New HoldCo LLC, a Delaware limited liability company, the managing member of which is the Company (“US Buyer”), and LOS Canada Operations Inc., a British Columbia corporation, and indirect, wholly-owned subsidiary of US Buyer (“Canadian Buyer”), completed the previously announced transactions contemplated by that certain Master Transaction Agreement, dated as of August 31, 2020, by and among the Company, US Buyer, Canadian Buyer, Schlumberger Technology Corporation, a Texas corporation (“Schlumberger US”), and Schlumberger Canada Limited, a corporation organized pursuant to the laws of the Province of Alberta (together with Schlumberger US, the “Schlumberger Parties”), pursuant to which US Buyer and Canadian Buyer acquired the Schlumberger Parties’ onshore hydraulic fracturing business (“OneStim”) in the United States and Canada, including its pressure pumping, pumpdown perforating, and Permian frac sand businesses (the “OneStim Acquisition”). This Current Report on Form 8-K/A (this “Amendment”) amends and supplements the Original Liberty Form 8-K to provide the following: • the unaudited and audited combined financial statements of OneStim (for the periods described in Item 9.01(a) below), the notes related thereto and the Report of Independent Auditors, as applicable; and • the unaudited pro forma condensed combined financial information described in Item 9.01(b) below. No other modifications to the Original Liberty Form 8-K are being made by this Amendment. This Amendment should be read in connection with the Original Liberty Form 8-K, which provides a more complete description of the OneStim Acquisition. |
| Amendment Flag | true |
| Entity Central Index Key | 0001694028 |
