Unaudited Condensed Consolidated Financial Statements (Policies)	3 Months Ended
	Mar. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting, Policy	Unaudited Condensed Consolidated Financial Statements We prepared the accompanying condensed consolidated financial statements of Valaris Limited and its subsidiaries (the "Company," "Valaris," "our," "we" or "us") in accordance with accounting principles generally accepted in the United States of America ("GAAP"), pursuant to the rules and regulations of the Securities and Exchange Commission (the "SEC") included in the instructions to Form 10-Q and Article 10 of Regulation S-X. The financial information included in this report is unaudited but, in our opinion, includes all adjustments (consisting of normal recurring adjustments) that are necessary for a fair presentation of our financial position, results of operations and cash flows for the interim periods presented. The December 31, 2024 Condensed Consolidated Balance Sheet data was derived from our 2024 audited consolidated financial statements but does not include all disclosures required by GAAP. The preparation of our condensed consolidated financial statements requires us to make certain estimates, judgments and assumptions that affect the reported amounts of assets and liabilities, the related revenues and expenses and disclosures of gain and loss contingencies as of the date of the financial statements. Actual results could differ from those estimates. Results of operations for the three months ended March 31, 2025 are not necessarily indicative of the results of operations that will be realized for the year ending December 31, 2025, or for any future period. We recommend these condensed consolidated financial statements be read in conjunction with our annual report on Form 10-K for the year ended December 31, 2024, filed with the SEC on February 20, 2025 (our "Annual Report").
New Accounting Pronouncements	New Accounting Pronouncements Accounting Pronouncements to be Adopted Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures - In November 2024, the FASB issued ASU No. 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses ("Update 2024-03"), which requires companies to disclose additional information for certain relevant expense categories in the Statements of Operations and within the notes to the financial statements. Update 2024-03 is effective for annual periods beginning after December 15, 2026, and interim periods beginning after December 15, 2027, with early adoption permitted and can be applied either prospectively to financial statements issued for reporting periods after the effective date, or retrospectively to prior periods which are presented in the financial statements. We are currently assessing the impact of the requirements on our condensed consolidated financial statements and disclosures. Improvements to Income Tax Disclosures - In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures ("Update 2023-09"), which expands income tax disclosure requirements to include additional information related to the rate reconciliation of our effective tax rates to statutory rates as well as additional disaggregation of taxes paid. The amendments in Update 2023-09 also remove disclosures related to certain unrecognized tax benefits and deferred taxes. Update 2023-09 is effective for fiscal years beginning after December 15, 2024, with early adoption permitted. The amendments are required to be applied on a prospective basis, with an option to apply the guidance retrospectively. We will adopt Update 2023-09 in the period required and while the adoption will result in expansion of our income tax disclosures, we do not expect it will impact the recognition or measurement of income taxes within our condensed consolidated financial statements. With the exception of the updated standards discussed above, there have been no accounting pronouncements issued and not yet effective that have significance, or potential significance, to our condensed consolidated financial statements.