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Document and Entity Information - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2024
Jan. 31, 2025
Jun. 30, 2024
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2024    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Trading Symbol NOV    
Entity Registrant Name NOV INC.    
Entity Central Index Key 0001021860    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Common Stock, Shares Outstanding   380,819,811  
Entity Public Float     $ 7.4
Entity Small Business false    
Entity Emerging Growth Company false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Interactive Data Current Yes    
ICFR Auditor Attestation Flag true    
Title of 12(b) Security Common Stock, par value $0.01 per share    
Security Exchange Name NYSE    
Entity File Number 1-12317    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 76-0475815    
Entity Address, Address Line One 10353 Richmond Avenue    
Entity Address, City or Town Houston    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 77042-4103    
City Area Code 346    
Local Phone Number 223-3000    
Document Annual Report true    
Document Transition Report false    
Documents Incorporated by Reference [Text Block]

Portions of the Proxy Statement in connection with the 2025 Annual Meeting of Stockholders are incorporated in Part III of this report.

    
Auditor Firm ID 42    
Auditor Name Ernst & Young LLP    
Auditor Location Houston, Texas    
Auditor Opinion

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of NOV Inc. (the Company) as of December 31, 2024 and 2023, the related consolidated statements of income, comprehensive income, cash flows, and stockholders’ equity for each of the three years in the period ended December 31, 2024, and the related notes and financial statement schedule listed in the Index at Item 15(2) (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the consolidated financial position of the Company at December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2024, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated February 14, 2025, expressed an unqualified opinion thereon.