Preparation of Interim Financial Statements and Other Items	9 Months Ended
	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Preparation of Interim Financial Statements and Other Items	Preparation of Interim Financial Statements and Other Items Basis of Presentation The financial statements presented in this report represent the consolidation of Cactus, Inc. (“Cactus Inc.”) and its subsidiaries (“the Company”), including Cactus Wellhead, LLC (“Cactus LLC”). Cactus Inc. is a holding company whose only material asset is an equity interest consisting of units representing limited liability company interests in Cactus LLC (“CW Units”). Cactus Inc. is the sole managing member of Cactus LLC and operates and controls all of the business and affairs of Cactus LLC and conducts its business through Cactus LLC and its subsidiaries. As a result, Cactus Inc. consolidates the financial results of Cactus LLC and its subsidiaries and reports a non-controlling interest related to the portion of CW Units not owned by Cactus Inc., which reduces net income attributable to holders of Cactus Inc.’s Class A common stock, par value $0.01 per share (“Class A common stock”). Except as otherwise indicated or required by the context, all references to “Cactus,” “we,” “us” and “our” refer to Cactus Inc. and its consolidated subsidiaries. The unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information. Accordingly, these consolidated financial statements do not include all information or notes required by generally accepted accounting principles for annual financial statements and should be read together with our Annual Report on Form 10-K for the year ended December 31, 2019. The consolidated financial statements include all adjustments, which are of a normal recurring nature, unless otherwise disclosed, necessary for a fair statement of the consolidated financial statements for the interim periods. The results of operations for any interim period are not necessarily indicative of the results to be expected for the full year. Use of Estimates In preparing our consolidated financial statements in conformity with GAAP, we make numerous estimates and assumptions that affect the accounting for and recognition and disclosure of assets, liabilities, equity, revenues and expenses. We must make these estimates and assumptions because certain information that we use is dependent on future events, cannot be calculated with a high degree of precision from available data or is not otherwise capable of being readily calculated based on accepted methodologies. In some cases, these estimates are particularly difficult to determine, and we must exercise significant judgment. Actual results could differ materially from the estimates and assumptions that we use in the preparation of our consolidated financial statements. Reclassifications Certain prior period amounts have been reclassified to conform to the current period presentation. Recent Accounting Pronouncements Standards Adopted Effective January 1, 2020, we adopted Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The new guidance changed the measurement of credit losses on financial assets measured at amortized cost, including but not limited to trade receivables. The new guidance replaced the prior methodology for recognizing credit losses when it is probable that a loss has been incurred with an expected loss model that requires consideration of a broader range of information to estimate expected credit losses over the lifetime of an asset. The allowance for credit losses under the new guidance represents the portion of the asset’s amortized cost basis that we do not expect to collect over the asset’s contractual life, considering past events, current conditions and reasonable and supportable forecasts of future economic conditions. Adoption of the standard did not impact our consolidated financial statements other than certain expanded disclosures. See further discussion and expanded disclosures in Note 3. We also adopted FASB ASU 2017-04, Intangibles – Goodwill and Other (Topic 350) effective January 1, 2020. The new standard simplified the accounting for goodwill impairment by eliminating Step 2 of the current goodwill impairment test. Under the new standard, an entity performs its goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and recognizes an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. The loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Adoption of this standard did not impact our consolidated financial statements.