Document and Entity Information Document Information [Table] Document Information [Line Items] Document and Entity Information Document Type Document Quarterly Report Document Period End Date Current Fiscal Year End Date Document Transition Report Securities Act File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, Country Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Central Index Key Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS Statement [Table] Statement [Line Items] Statement Disclosure Operating Income (Loss) [Abstract] Operating revenues Revenue from Contract with Customer, Excluding Assessed Tax Contract drilling revenues Revenue from Contract with Customer, Product and Service [Extensible Enumeration] Costs and Expenses [Abstract] Costs and expenses Cost of Goods and Services Sold Operating and maintenance Cost, Product and Service [Extensible Enumeration] Depreciation, Depletion and Amortization Depreciation and amortization General and Administrative Expense General and administrative Costs and Expenses Total costs and expenses Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Gain on disposal of assets, net Gain on disposal of assets, net Gain (loss) on the sale of assets Operating Income (Loss) Operating income Nonoperating Income (Expense) [Abstract] Other income (expense), net Investment Income, Interest Interest income Interest Expense, Nonoperating Interest expense Total Gain (Loss) on Extinguishment of Debt Loss on retirement of debt Loss on retirement of debt Other Nonoperating Income (Expense) Other, net Nonoperating Income (Expense) Total other income (expense), net Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income (loss) before income taxes Income Tax Expense (Benefit) Income tax expense (benefit) Net income (loss) Earnings Per Share, Basic Earnings (loss) per share, basic (in dollars per share) Earnings Per Share, Diluted Earnings (loss) per share, diluted (in dollars per share) Weighted Average Number of Shares Outstanding, Basic Weighted-average shares for per share calculation, basic (in shares) Weighted-average shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Diluted Weighted-average shares for per share calculation, diluted (in shares) Weighted-average shares outstanding, diluted (in shares) CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax Components of net periodic benefit costs before reclassifications Other Comprehensive Income (Loss), before Tax Other comprehensive income (loss) before income taxes Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total comprehensive loss attributable to controlling interest Total comprehensive income (loss) CONDENSED CONSOLIDATED BALANCE SHEETS Assets [Abstract] Assets Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Receivables, Net, Current Accounts receivable, net of allowance of $2 at March 31, 2026 and December 31, 2025 Prepaid Supplies Materials and supplies, net of allowance of $144 and $140 at March 31, 2026 and December 31, 2025, respectively Disposal Group, Including Discontinued Operation, Assets, Current Assets held for sale Restricted Cash and Investments, Current Restricted cash and cash equivalents Other Assets, Current Other current assets Assets, Current Total current assets Property, Plant and Equipment, Gross Property and equipment Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less accumulated depreciation Property, Plant and Equipment, Net Property and equipment, net Deferred Income Tax Assets, Net Deferred tax assets, net Other Assets, Noncurrent Other assets Assets Total assets Liabilities and Equity [Abstract] Liabilities and equity Accounts Payable, Current Accounts payable Accrued Income Taxes, Current Accrued income taxes Debt, Current Debt due within one year Other Liabilities, Current Other current liabilities Liabilities, Current Total current liabilities Long-Term Debt and Lease Obligation Long-term debt Deferred Income Tax Liabilities, Net Deferred tax liabilities, net Other Liabilities, Noncurrent Other long-term liabilities Liabilities, Noncurrent Total long-term liabilities Commitments and Contingencies Commitments and contingencies Common Stock, Value, Issued Shares, $0.10 par value, 1,204 authorized, 141 conditionally authorized, 1,204 issued at March 31, 2026 and December 31, 2025, and 1,107 and 1,102 outstanding at March 31, 2026 and December 31, 2025, respectively Additional Paid in Capital Additional paid-in capital Retained Earnings (Accumulated Deficit) Accumulated deficit Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Equity, Attributable to Parent Total equity Liabilities and Equity Total liabilities and equity Accounts Receivable, Allowance for Credit Loss, Current Allowance for doubtful accounts Inventory Valuation Reserves Materials and supplies, allowance for obsolescence Common Stock, Par or Stated Value Per Share Shares, Par value Common Stock, Shares Authorized Shares, authorized Conditional capital represents the amount of additional registered shares that the board is authorized to issue without obtaining additional shareholder approval. Shares Conditionally Authorized Shares, conditionally authorized Common Stock, Shares, Issued Shares, issued Common Stock, Shares, Outstanding Shares, outstanding CONDENSED CONSOLIDATED STATEMENTS OF EQUITY Equity Components [Axis] Equity Component [Domain] Parent [Member] Total controlling interest shareholders' equity Common Stock [Member] Shares Additional Paid-in Capital [Member] Additional paid-in capital Retained Earnings [Member] Accumulated deficit AOCI Attributable to Parent [Member] Accumulated other comprehensive loss Noncontrolling Interest [Member] Noncontrolling interest Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Shareholders' Equity Equity, Including Portion Attributable to Noncontrolling Interest Balance, end Balance, beginning APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Share-based compensation Stock Issued During Period, Value, New Issues Issuance of shares Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total comprehensive income (loss) CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Related and Nonrelated Parties [Axis] Related and Nonrelated Parties [Domain] Related Party [Member] Related party Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income (loss) Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile to net cash provided by operating activities: Share-Based Payment Arrangement, Noncash Expense Share-based compensation expense Amortization of Debt Issuance Costs and Discounts Amortization Amortization of debt-related balances, net Unrealized Gain (Loss) on Derivatives (Gain) loss on adjustment to bifurcated compound exchange feature (Gain) loss on adjustment to bifurcated compound exchange feature Deferred Income Tax Expense (Benefit) Deferred income tax expense (benefit) Other Noncash Income (Expense) Other, net Increase (Decrease) in Contract with Customer, Liability Changes in contract liabilities, net Increase (Decrease) in Deferred Charges Changes in deferred costs, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Changes in other operating assets and liabilities, net Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities Payments to Acquire Property, Plant, and Equipment Capital expenditures Proceeds from Sale of Property, Plant, and Equipment Proceeds from disposal of assets, net of costs to sell Proceeds from Sale of Notes Receivable Proceeds from disposal of investment in note receivable from unconsolidated affiliate Net Cash Provided by (Used in) Investing Activities Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities Repayments of Long-Term Debt Repayments of debt Repayments of debt Proceeds from (Payments for) Other Financing Activities Other, net Net Cash Provided by (Used in) Financing Activities Net cash used in financing activities Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net decrease in unrestricted and restricted cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Unrestricted and restricted cash and cash equivalents, end of period Unrestricted and restricted cash and cash equivalents, beginning of period Business Nature of Operations [Text Block] Business Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Significant Accounting Policies Accounting Standards Updates Accounting Standards Update and Change in Accounting Principle [Text Block] Accounting Standards Updates Revenues. Revenue from Contract with Customer [Text Block] Revenues Long-Lived Assets. The entire disclosure for long-lived assets including property and equipment and right-of-use assets used in normal conduct of business and not intended for resale. Long-Lived Assets Disclosure [Text Block] Long-Lived Assets Debt Debt Disclosure [Text Block] Debt Income Taxes Income Tax Disclosure [Text Block] Income Taxes Earnings (Loss) Per Share Earnings Per Share [Text Block] Earnings (Loss) Per Share Contingencies Commitments and Contingencies Disclosure [Text Block] Contingencies Equity Equity [Text Block] Equity Financial Instruments Fair Value Disclosures [Text Block] Financial Instruments Basis of Accounting, Policy [Policy Text Block] Presentation Use of Estimates, Policy [Policy Text Block] Accounting estimates Fair Value of Financial Instruments, Policy [Policy Text Block] Fair value measurements New Accounting Pronouncements, Policy [Policy Text Block] Accounting standards updates Disaggregation of Revenue [Table Text Block] Schedule of revenue disaggregation Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Schedule of contract balances and changes Schedule of Long-Term Debt Instruments [Table] Debt Instrument [Line Items] Debt Schedule of Debt [Table Text Block] Schedule of debt Schedule of Maturities of Long-Term Debt [Table Text Block] Scheduled installments and maturities of debt Convertible Debt [Table Text Block] Schedule of convertible debt Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of basic and diluted loss per share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of antidilutive securities Fair Value, by Balance Sheet Grouping [Table Text Block] Carrying amounts and fair values of the financial instruments Disclosure of information about nature of operations. Nature of Operations [Table] Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Domain] Represents information related to the ultra-deepwater floaters asset group. Ultra Deepwater Floaters [Member] Ultra-deepwater floaters Represents information related to the harsh environment floaters asset group. Harsh Environment Floaters [Member] Harsh environment floaters Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Represents the member information pertaining to Valaris Limited. Valaris Limited [Member] Valaris Limited Legal Entity [Axis] Entity [Domain] Line item represents nature of operations. Nature of Operations [Line Items] Business Number of mobile offshore drilling units. Number of Mobile Offshore Drilling Units Number of mobile offshore drilling units Ratio applied to the exchange of shares in business combination. Business Combination, Share Exchange Ratio Share exchange ratio Business Combination, Acquisition Related Costs Acquisition costs Disaggregation of Revenue [Table] Product and Service [Axis] Product and Service [Domain] Geographical [Axis] Geographical [Domain] UNITED STATES U.S. BRAZIL Brazil NORWAY Norway Represents a country or countries that are not otherwise specified. Other Geographical [Member] Other Countries Disaggregation of Revenue [Line Items] Revenue Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract] Contract balances Contract with Customer, Liability, Current Deferred contract revenues, recorded in other current liabilities Contract with Customer, Liability, Noncurrent Deferred contract revenues, recorded in other long-term liabilities Contract with Customer, Liability Total contract liabilities, end of period Total contract liabilities, beginning of period Total contract liabilities Change in Contract with Customer, Asset and Liability [Abstract] Changes to contract liabilities Contract with Customer, Liability, Revenue Recognized Decrease due to recognition of revenues for goods and services Amount of increase in contract with customer obligation for the transfer goods or services to customers. Contract with Customer, Liability, Increase (Decrease) for Transfer to Customer Increase due to goods and services transferred over time Capitalized Contract Cost, Amortization Recognized pre-operating costs Capitalized Contract Cost, Net Unrecognized pre-operating costs Long-Lived Asset, Held-for-Sale [Table] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group, Held-for-Sale, Not Discontinued Operations [Member] Assets held for sale Long-Lived Assets Held-for-Sale [Line Items] Assets held for sale Disposal Groups, Including Discontinued Operations [Table] Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Assets sold, not discontinued operations Disposal Group Name [Axis] Disposal Group Name [Domain] Represents the sale of rig(s) and related equipment. Rig sales [Member] Rig sales Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Disposals Debt Instrument [Axis] Debt Instrument, Name [Domain] Represents the information pertaining to Notes Due 7.45 Percent April 2027. Notes Due 7.45 Percent April 2027 [Member] 7.45% Notes due April 2027 Represents the information pertaining to Debentures Due 8 Percent April 2027. Debentures due 8 Percent April 2027 [Member] 8.00% Debentures due April 2027 Represents the information related to the shipyard financing arrangement. Shipyard Financing Arrangement [Member] 4.50% Shipyard Loans due September 2027 Represents the information pertaining to Senior Secured Notes Due 8.375 Percent February 2028. Senior Secured Notes Due 8.375 Percent February 2028 [Member] 8.375% Senior Secured Notes due February 2028 Represents the information pertaining to Notes Due 7 Percent June 2028. 7.00% Notes due 7 Percent June 2028 [Member] 7.00% Notes due June 2028 Represents the information pertaining to Senior Secured Notes Due 8.00 Percent September 2028. Senior Secured Notes Due 8 Percent September 2028 [Member] 8.00% Senior Secured Notes due September 2028 Represents information about senior notes 8.25 percent due May 2029. Senior Notes, 8.25Percent, Due May 2029 [Member] 8.25% Senior Notes due May 2029 Represents the information pertaining to 4.625% Senior Guaranteed Exchangeable Bonds due September 2029. Senior Guaranteed Exchangeable Bonds 4.625 Percent Due September 2029 [Member] 4.625% Senior Guaranteed Exchangeable Bonds due September 2029 Represents the information pertaining to Senior Secured Notes Due 8.75 Percent February 2030. Senior Secured Notes due 8.75 Percent February 2030 [Member] 8.75% Senior Secured Notes due February 2030 Represents the information pertaining to Notes Due 7.5 Percent April 2031. Notes due 7.50 Percent April 2031 [Member] 7.50% Notes due April 2031 Represents information about senior notes 8.50 percent due May 2031. Senior Notes, 8.50 Percent, Due May 2031 [Member] 8.50% Senior Notes due May 2031 Represents the 7.875% senior guaranteed notes due October 2032. Senior Guaranteed Notes, 7.875 Percent, Due October 2032 [Member] 7.875% Senior Guaranteed Notes due October 2032 Represents the information pertaining to Senior Notes Due 6.80 Percent March 2038. Senior Notes due 6.80 Percent March 2038 [Member] 6.80% Senior Notes due March 2038 Represents the information pertaining to Senior Notes Due 7.35 Percent December 2041. Senior Notes due 7.35 Percent December 2041 [Member] 7.35% Senior Notes due December 2041 Long-Term Debt, Other Disclosure [Abstract] Principal amount Long-Term Debt, Gross Total principal amount of debt Current portion before unamortized (discount) premium and debt issuance costs, of long-term debt. Long-term Debt, Gross, Current Debt due within one year Non current portion before unamortized (discount) premium and debt issuance costs, of long-term debt. Long-term Debt, Gross, Non Current Long-term debt Long-Term Debt, by Current and Noncurrent [Abstract] Carrying amount Debt and Lease Obligation Total debt Total debt Long-Term Debt and Lease Obligation, Current Debt due within one year Debt Instrument, Interest Rate, Stated Percentage Debt instrument interest rate stated percentage Represents the debt total installments. Debt Total Installments [Member] Total installments Maturities of Long-Term Debt [Abstract] Scheduled maturities of debt Long-Term Debt, Maturities, Repayments of Principal in Next Rolling 12 Months 2027 Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Two 2028 Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Three 2029 Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Four 2030 Long-Term Debt, Maturities, Repayments of Principal in Rolling after Year Five Thereafter Debt Instrument, Unamortized Discount (Premium), Net Total unamortized debt-related balances, net Embedded Derivative, Fair Value of Embedded Derivative Liability Bifurcated compound exchange feature, at estimated fair value Long-Term Debt Total carrying amount of debt Revolving Credit Facility [Member] Five-Year Revolving Credit Facility Scenario [Axis] Scenario [Domain] The first period scenario under the agreement. Period One [Member] June 2028 Statistical Measurement [Axis] Statistical Measurement [Domain] Minimum [Member] Minimum Maximum [Member] Maximum Line of Credit Facility, Maximum Borrowing Capacity Borrowing capacity, maximum Amount of aggregate principal due within 91 days that would trigger an early maturity of the secured credit facility if available cash is less than the minimum stated amount. Debt, Early Maturity Trigger, Threshold Debt Outstanding Early maturity trigger, principal due within 91 days Amount of available cash below which would trigger an early maturity of the secured credit facility if the aggregate principal due within 91 days is equal to or greater than the stated amount. Debt, Early Maturity Trigger, Threshold Available Cash Early maturity trigger available cash Amount of commitment increase permitted under the secured credit facility subject to identification of a willing financial provider. Line of Credit Facility Contingent Increase, Additional Borrowing Capacity Permitted commitment increase Long-Term Line of Credit Credit facility amount outstanding Letters of Credit Outstanding, Amount Letters of credit issued and outstanding Line of Credit Facility, Current Borrowing Capacity Credit facility available borrowing capacity Debt Instrument, Basis Spread on Variable Rate Spread on variable rate basis (as a percent) Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Percentage points adjusted to the reference rate to compute the variable rate on the debt instrument. Debt Instrument, Variable Rate, Adjustment Variable rate spread adjustment (as a percent) Line of Credit Facility, Commitment Fee Percentage Commitment fee (as a percent) Convertible Debt [Member] Convertible debt instruments Scenario, Plan [Member] Plan Represents the percentage of market price of shares relative to the exchange price. Debt Instrument Repurchase Requirement Due To Occurrence Of Certain Events Percentage Of Original Principal Amount to repurchase upon the occurrence of certain events (as a percent) Number of trading days average closing price is used to determine average stock price for purposes of triggering right to redeem all or a portion of the notes. Number of Trading Days Used to Calculate Average Stock Price Trading days for calculation of average stock price Debt Instrument, Interest Rate, Effective Percentage Effective interest rate (as a percent) Long-Term Debt, Fair Value Fair value of debt Debt Instrument, Convertible, Conversion Ratio Debt conversion ratio Debt Instrument, Convertible, Conversion Price Debt conversion (in dollars per share) Debt Instrument, Convertible, Number of Equity Instruments Shares issuable (in shares) Extinguishment of Debt, Amount Aggregate principal amount of debt retired Long-Term Debt, Type [Axis] Long-Term Debt, Type [Domain] Interest Expense, Nonoperating [Abstract] Interest Expense Interest Expense, Debt, Excluding Amortization Contractual interest Debt Instrument, Periodic Payment, Principal Scheduled installment Disclosure of information about income taxes. Income Taxes [Table] Nature of Uncertainty [Axis] Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Nature of Uncertainty [Domain] Information related to corporate income taxes. Corporate income tax [Member] Corporate income tax Information related to indirect taxes. Indirect tax [Member] Indirect tax Line items represent information about income taxes. Income Taxes [Line Items] Income taxes Effective Income Tax Rate Reconciliation, Percent Effective tax rate (as a percent) Tax Adjustments, Settlements, and Unusual Provisions Various discrete tax items expense (benefit) Income Tax Examination, Estimate of Possible Loss Net adjustments of additional taxes, including interest and penalties Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations, excluding discrete items. Effective Income Tax Rate Reconciliation, Excluding Discrete Items, Percent Annual effective tax rate excluding discrete items (as a percent) Antidilutive Security, Excluded EPS Calculation [Table] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Share-Based Payment Arrangement [Member] Share-based awards Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Anti-dilutive securities Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Securities excluded from earnings per share calculation (in shares) Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Numerator for earnings (loss) per share, basic Net Income (Loss) Available to Common Stockholders, Basic Income (loss) for per share calculation, basic Weighted Average Number of Shares Outstanding, Basic [Abstract] Denominator for earnings (loss) per share, basic Weighted Average Number of Shares Issued, Basic Weighted-average shares outstanding (in shares) Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Numerator for earnings (loss) per share, diluted Interest on Convertible Debt, Net of Tax Effect of convertible debt instruments, net of tax Net Income (Loss) Available to Common Stockholders, Diluted Income (loss) for per share calculation, diluted Weighted Average Number of Shares Outstanding, Diluted [Abstract] Denominator for earnings (loss) per share, diluted Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Effect of convertible debt instruments (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Effect of share-based awards (in shares) Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants Effect of warrants (in shares) Loss Contingencies [Table] Litigation Case [Axis] Litigation Case [Domain] Represents the Asbestos litigation lawsuit filed against the entity. Asbestos litigation [Member] Asbestos litigation LOUISIANA Information related to Illinois and Missouri. Illinois and Missouri Loss Contingencies [Line Items] Contingencies Loss Contingency, Number of Plaintiffs Number of plaintiffs Loss Contingency, Pending Claims, Number Number of claims Class of Warrant or Right [Table] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event Class of Warrant or Right [Line Items] Warrants Class of Warrant or Right, Number of Securities Called by Warrants or Rights Number of warrants issued to subscribe Class of Warrant or Right, Exercise Price of Warrants or Rights Exercise price Adjustments to Additional Paid in Capital, Warrant Issued Estimated fair value Number of warrants or rights exercised during the period. Class of Warrant or Right, Exercised No of warrants exercised Stock Issued Shares issued Fair Value, by Balance Sheet Grouping [Table] Measurement Basis [Axis] Portion at Fair Value Measurement [Member] Reported Value Measurement [Member] Carrying amount Estimate of Fair Value Measurement [Member] Fair value Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Financial instruments Cash and Cash Equivalents, Fair Value Disclosure Cash and cash equivalents Restricted Cash and Cash Equivalents Restricted cash and cash equivalents