Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Title of 12(b) Security Title of 12(b) Security Adjustment to Compensation, Amount Adjustment to Compensation Amount Segment Reporting [Abstract] Schedule of Estimated Future Amortization of Intangible Assets Intangible Asset, Finite-Lived, and Capitalized Cost, Software to be Sold, Leased, or Marketed, Estimated Amortization Expense [Table Text Block] Revenue from External Customers by Products and Services [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Table] Compensation and related benefit costs Employee-related Liabilities, Current Net loss Business Acquisitions Pro Forma Revenue Profit Loss Business acquisitions pro forma revenue profit loss. Derivative Instrument [Axis] Derivative Instrument [Axis] Property, plant, and equipment purchases in accounts payable Change In Property, Plant, And Equipment Purchases In Accounts Payable Property, plant, and equipment purchases in accounts payable. Conversion price (in dollars per share) Debt Instrument, Convertible, Conversion Price Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Developed technology Developed Technology Rights [Member] Property, plant, and equipment, net Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment Short-term marketable securities Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, after Allowance for Credit Loss, Current Depreciation and amortization expense Other Depreciation and Amortization Leases [Abstract] Other comprehensive (loss) income, net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Prepaid Expenses and Other Current Assets Prepaid Expenses And Other Current Assets [Policy Text Block] Proceeds from cash flow hedge derivative contracts Payments for (Proceeds from) Hedge, Financing Activities Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Intangible assets, net Intangible Asset, Excluding Goodwill, after Accumulated Amortization Share-based Payment Arrangement, Tranche 1 Share-Based Payment Arrangement, Tranche One [Member] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Convertible Senior Notes Due 2030 And 2031 (Notes) Convertible Senior Notes Due 2030 And 2031 (Notes) [Member] Convertible Senior Notes Due 2030 And 2031 (Notes) Asset retirement obligation Asset Retirement Obligation Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Number of reportable segments Number of Reportable Segments Total current liabilities Liabilities, Current Work in progress Inventory, Work in Process, Net of Reserves Customer relationships Customer Relationships [Member] Derivative liabilities, current Derivative liabilities, current Derivative Liability, Current Entity Address, City or Town Entity Address, City or Town Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Statement of Financial Position [Abstract] Product Product [Member] Net Book Value Intangible Asset, Finite-Lived, after Accumulated Amortization Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Accrued expenses and other current liabilities Business Combination, Recognized Liability Assumed, Accrued Liabilities And Other Liabilities, Current Business Combination, Recognized Liability Assumed, Accrued Liabilities And Other Liabilities, Current Level 2 Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Other comprehensive (loss) income, net of tax Other comprehensive income (oss) Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Stock issued for vested restricted stock units (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Concentration Risk Type [Axis] Concentration Risk Type [Axis] Unrealized gain (loss) on cash flow hedges, net of tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Facility and Equipment Decommissioning Liabilities Asset Retirement Obligation [Policy Text Block] Schedule of Segment Reporting Segment Reporting [Table Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Related Party [Axis] Related and Nonrelated Parties [Axis] Unrealized gain (loss) on cash flow hedges, net of tax Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member] Unrealized gain (loss) on net investment hedges, net of tax Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), After Reclassification And Tax Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), After Reclassification And Tax Measurement period Adjustments, Other liabilities, non-current Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Liabilities, Non-current Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Liabilities, Non-current Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Schedule of Undiscounted Future Minimum Lease Payments Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Document Period End Date Document Period End Date Loan amount Debt Instrument, Face Amount 2028 Lessee, Operating Lease, Liability, to be Paid, Year Two Contract Asset Balance Contract Asset Balance [Member] Contract Asset Balance Treasury stock, at cost; 5,811,387 shares at June 30, 2026 and 3,492,619 shares December 31, 2025 Treasury Stock, Common, Value Effective interest rate (as a percent) Debt Instrument, Interest Rate, Effective Percentage Supplemental Disclosures to Condensed Consolidated Statements of Cash Flows Cash Flow, Supplemental Disclosures [Text Block] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Convertible debt Convertible Debt 2028 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Two Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Class B Common Stock Common Class B [Member] Consolidation Items [Domain] Consolidation Items [Domain] Unrealized gain on pension and postretirement benefit plans, net of tax Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member] Convertible Senior Notes Due 2031 (Notes) 2031 notes Convertible Senior Notes Due 2031 (Notes) [Member] Convertible Senior Notes Due 2031 (Notes) Operating lease liabilities, current Current operating lease liabilities Operating Lease, Liability, Current Less: billings to date Billed Contracts Receivable Earnings Per Share Earnings Per Share [Text Block] Earnings per common share attributable to Mirion Technologies, Inc.: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Schedule of Revenue from External Customers by Products and Services Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Table Text Block] Total liabilities Liabilities Trading Symbol Trading Symbol Purchases of property, plant, and equipment and badges Payments to Acquire Property, Plant, and Equipment Measurement period Adjustments, Purchase consideration Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred Schedule of Fair Value of Net Assets Acquired Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] Company Selected Measure Name Company Selected Measure Name Adjusted cost of revenues Adjusted Income Loss From Operations Adjusted Income Loss From Operations Income Tax Disclosure [Abstract] Line of credit facility, commitment fee (as a percent) Line of Credit Facility, Commitment Fee Percentage OPERATING ACTIVITIES: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Cross-currency rate swap Cross Currency Interest Rate Contract [Member] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Useful life Depreciable Lives Property, Plant, and Equipment, Useful Life Schedule of Components of Prepaid Expenses and Other Current Assets Schedule of Other Current Assets [Table Text Block] Change in deferred income taxes Deferred Income Taxes and Tax Credits Adjustments Restructuring Reserve, Accrual Adjustment Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Schedule of Cost and Billings on Uncompleted Construction Type Long Term Contracts or Programs Schedule Of Cost And Billings On Uncompleted Construction Type Long Term Contracts Or Programs [Table Text Block] Schedule of cost and billings on uncompleted construction type long term contracts or programs. Award vesting rights (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Line of credit facility, current borrowing capacity Line of Credit Facility, Current Borrowing Capacity Gross profit Gross Profit Operating lease, payments Operating Lease, Payments Purchases of capped calls related to convertible senior notes Purchases Of Capped Calls Related To Convertible Senior Notes Purchases Of Capped Calls Related To Convertible Senior Notes Award Timing Predetermined Award Timing Predetermined [Flag] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Level 1 Fair Value, Inputs, Level 1 [Member] Internally developed software Software, Internally Developed [Member] Intermediate Co Intermediate Co [Member] Intermediate Co. Effective income tax rate reconciliation (as a percent) Effective Income Tax Rate Reconciliation, Percent Grantee Status [Domain] Grantee Status [Domain] Conversion ratio Debt Instrument, Convertible, Conversion Ratio Effect of potentially dilutive securities — stock-based awards (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Accrued Expenses and Other Current Liabilities, and Deferred Income Taxes and Other Long-Term Liabilities [Abstract] Accrued Expenses And Other Current Liabilities [Abstract] Accrued Expenses And Other Current Liabilities Accrued expenses and other current liabilities Increase Decrease In Accrued Liabilities And Other Liabilities Current Increase decrease in accrued liabilities and other liabilities current. Depreciation expense Depreciation Vesting [Domain] Vesting [Domain] Plan Name [Domain] Plan Name [Domain] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Operating lease right-of-use assets Operating lease assets Operating Lease, Right-of-Use Asset Concentration Risk Type [Domain] Concentration Risk Type [Domain] Lessee, operating lease, renewal term Lessee, Operating Lease, Renewal Term Fair Value Disclosures [Abstract] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Expiration Date Trading Arrangement Expiration Date 2030 Long-Term Debt, Maturity, Year Four Hedging Relationship [Axis] Hedging Relationship [Axis] Cash, cash equivalents, and restricted cash Cash and Cash Equivalents, Fair Value Disclosure Total stockholders’ equity Beginning balance Ending balance Noncontrolling interest Accumulated other comprehensive loss Equity, Including Portion Attributable to Noncontrolling Interest Nonrelated Party Nonrelated Party [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Derivative [Table] Derivative [Table] Other expense (income): Less other expense (income): Other Income and Expenses [Abstract] Nuclear Nuclear Power [Member] Nuclear Power Accounts receivable, net Business Combination, Recognized Asset Acquired, Receivable, Current Unamortized debt issuance costs Debt Instrument, Unamortized Discount (Premium), Net INVESTING ACTIVITIES: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Lessee, operating lease, remaining lease term Lessee, Operating Lease, Remaining Lease Term Net loss attributable to Mirion Technologies, Inc. stockholders Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax Exercise price (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Per Share Weighted Average Price of Shares Purchased Segments [Domain] Segments [Domain] Interest rate swaps Interest Rate Swap [Member] Borrowings Convertible Debt Debt Disclosure [Text Block] Less: deferred financing costs Debt Issuance Costs, Net Schedule of Restructuring and Related Costs Restructuring and Related Costs [Table Text Block] Business Combination [Table] Business Combination [Table] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Secured Debt Secured Debt [Member] Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Interest rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Mirion Technologies, Inc. stockholders’ equity Equity, Attributable to Parent Other assets Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent ASSETS Assets [Abstract] Business acquisition equity interest issued or issuable (in shares) Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares Insider Trading Policies and Procedures [Line Items] Measurement period Adjustments, Goodwill Measurement period adjustments Goodwill, Measurement Period Adjustment Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Performance Shares Performance Shares [Member] Prepaid expenses and other current assets Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Table] Other Other Research [Member] Other Research Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items] Schedule of Unconditional Purchase Obligations Schedule Of Unconditional Purchase Obligations [Table Text Block] Schedule Of Unconditional Purchase Obligations Antidilutive securities excluded from computation of earnings per share, amount (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of operating segments Number of Operating Segments Schedule of Goodwill Goodwill [Table Text Block] Gross Carrying Amount Goodwill, Gross Entity Central Index Key Entity Central Index Key Less: accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Remainder of 2026 Long-Term Debt, Maturity, Remainder of Fiscal Year Discretionary retirement plan Discretionary Retirement Plan Assets, Fair Value Disclosure Discretionary Retirement Plan Assets, Fair Value Disclosure Estimated earnings Contract With Customer, Asset, Estimated Earnings Contract With Customer, Asset, Estimated Earnings Less: cumulative loss attributable to noncontrolling interests AOCI Attributable to Noncontrolling Interest [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Other Other Care [Member] Other Care Derivatives Designated as Hedging Instruments Designated as Hedging Instrument [Member] Project One Project One [Member] Project One Line of credit facility, stepdowns, commitment fee (as a percent) Line Of Credit Facility, Stepdowns, Commitment Fee Percentage Line Of Credit Facility, Stepdowns, Commitment Fee Percentage Schedule of Property, Plant, and Equipment by Geographical Areas Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table Text Block] Damages subject to contractual cap, value Loss Contingency, Damages Sought, Contractual Cap, Value Loss Contingency, Damages Sought, Contractual Cap, Value Variable Rate [Domain] Variable Rate [Domain] Accumulated Other Comprehensive (Loss) Income Accumulated other comprehensive loss AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Schedule of Revenue from External Customers by Geographic Areas Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue [Table Text Block] Finished goods Inventory, Finished Goods, Net of Reserves IntermediateCo Class B Common Stock IntermediateCo Class B Common Stock [Member] IntermediateCo Class B common stock [Member] Statement [Line Items] Statement [Line Items] Total assets Assets Call Option Call Option [Member] Convertible Senior Notes Due 2030 (Notes) 2030 notes Convertible Senior Notes Due 2030 (Notes) [Member] Convertible Senior Notes Due 2030 (Notes) Common stock, capital shares reserved for future issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Convertible Debt Effect of potentially dilutive securities — convertible debt Convertible Debt [Member] Operating Segments Operating Segments [Member] Interest expense Interest expense Interest Expense, Nonoperating Badges Badges [Member] Badges. Stock-Based Compensation Share-Based Payment Arrangement [Text Block] PEO PEO [Member] 2028 Long-Term Debt, Maturity, Year Two Costs in excess of billings Business Combination, Recognized Asset Acquired, Costs In Excess of Billings Business Combination, Recognized Asset Acquired, Costs In Excess of Billings Other liabilities Other Liabilities, Noncurrent Goodwill Goodwill, beginning balance Goodwill, ending balance Goodwill Purchase Agreement Purchase Agreement [Member] Purchase Agreement Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Accounts payable Business Combination, Recognized Liability Assumed, Accounts Payable, Current Accumulated Deficit Retained Earnings [Member] Operating lease liabilities, non-current Non-current operating lease liabilities Operating Lease, Liability, Noncurrent Total operating expenses Operating Expenses Revolving Credit Facility Revolving Credit Facility [Member] Software development costs Software, In-Development, Internally Developed, and Purchased [Member] Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Diluted (in dollars per share) Net earnings per common share attributable to Mirion Technologies, Inc. — diluted (in dollars per share) Earnings Per Share, Diluted Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Amortization expense for intangible assets Intangible Asset, Finite-Lived, Amortization Expense Intangible Asset, Finite-Lived [Line Items] Intangible Asset, Finite-Lived [Line Items] Labs and research Labs and Research [Member] Labs and Research Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Total revenues Revenues Revenue from Contract with Customer, Excluding Assessed Tax Remaining performance obligations Remaining Performance Obligations Customer Contract Remaining performance obligations customer contract. Schedule of Restructuring Reserve by Type of Cost Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Purchases of treasury stock Stock Repurchased During Period, Value Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Construction in progress Construction in Progress [Member] Accrued warranty costs Product Warranty Accrual, Current Aggregate principal amount of Notes must be outstanding and not subject to redemption Debt Instrument, Redemption, Face Amount Of Notes That Must Be Outstanding Debt Instrument, Redemption, Face Amount Of Notes That Must Be Outstanding Schedule of Contractual Principal Payments Schedule of Future Maturities of the Notes Schedule of Maturities of Long-Term Debt [Table Text Block] Restructuring charges Restructuring and Related Cost, Expected Cost Remaining Income from operations Operating Income (Loss) Service Service [Member] Business Combinations, Acquisitions, and Business Disposals Business Combination [Text Block] Percentage of stock price trigger (as a percent) Debt Instrument, Convertible, Maximum Percentage of Stock Price Trigger Debt Instrument, Convertible, Maximum Percentage of Stock Price Trigger Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Land, buildings, and leasehold improvements Land, Buildings and Improvements [Member] Other tax receivables Deferred Income Taxes and Other Tax Receivable, Current Common stock, shares issued (in shares) Common Stock, Shares, Issued Accumulated Other Comprehensive Loss Comprehensive Income (Loss) Note [Text Block] Accounts receivable Increase (Decrease) in Accounts Receivable Product and Service [Domain] Product and Service [Domain] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Restructuring Restructuring Reserve, Current Deferred income taxes, non-current Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Termination Date Trading Arrangement Termination Date Noncontrolling Interest [Table] Noncontrolling Interest [Table] Net tangible assets acquired Business Combination Recognized Identifiable Tangible Assets Acquired And Liabilities Assumed Net Business Combination Recognized Identifiable Tangible Assets Acquired And Liabilities Assumed Net Measurement period Adjustments, Inventories Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory Subsequent Events [Abstract] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Total amortizable intangible assets Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Prepaid expenses and other currents assets Derivative Asset, Current Fair Value as of Grant Date Award Grant Date Fair Value Redemption price (as a percent) Debt Instrument, Redemption Price, Percentage Revolving credit facility of exceed revolving credit commitment (as a percent) Revolving Credit Facility Of Exceed Revolving Credit Commitment, Percentage Revolving Credit Facility Of Exceed Revolving Credit Commitment, Percentage Schedule of Goodwill [Table] Goodwill [Table] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Deferred contract revenue Business Combination, Recognized Liability Assumed, Deferred Revenue, Current Arrangement Duration Trading Arrangement Duration Medical Medical Medical Segment [Member] Medical Segment [Member] Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Gross Carrying Amount Intangible Asset, Finite-Lived, before Accumulated Amortization Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Unrealized loss on net investment hedges, net of tax Accumulated Other Comprehensive Income (Loss), Derivative Qualifying as Hedge, Excluded Component, Including Portion Attributable to Noncontrolling Interest [Member] Measurement period Adjustments, Other assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Assets Non Current Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Assets Non Current Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period 2021 Omnibus Incentive Plan 2021 Omnibus Incentive Plan [Member] 2021 Omnibus Incentive Plan Goodwill [Roll Forward] Goodwill [Roll Forward] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Trade names Trade Names [Member] Schedule of Assets and Liabilities Measured at Fair Value Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Award Type [Domain] Award Type [Domain] 2026 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Fair Value Measurements Fair Value Disclosures [Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Common stock, convertible, conversion ratio Common Stock, Convertible, Conversion Ratio Common Stock, Convertible, Conversion Ratio 2027 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year One Shares repurchased to satisfy tax withholdings for vesting restricted stock units (in shares) Treasury Stock, Shares, Acquired Share price (in dollars per share) Share Price Business Combination, Separately Recognized Transaction [Table] Business Combination, Separately Recognized Transaction [Table] Threshold percentage of stock price trigger (as a percent) Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Geographical [Axis] Geographical [Axis] Restricted cash Restricted Cash Concentrations of Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Measurement period Adjustments, Cash Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Shares repurchased to satisfy tax withholdings for vesting restricted stock units Treasury Stock, Value, Acquired, Cost Method Payments Payments for Restructuring Cash, cash equivalents, and restricted cash at beginning of period Cash, cash equivalents, and restricted cash at end of period Total cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Stock issued from treasury stock for vested restricted stock units Stock Issued During Period, Value, Treasury Stock Reissued Schedule of Finite-Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Non-NEOs Non-NEOs [Member] 2028 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two Contracts in progress Contract With Customer, Asset, Gross Amount Contract With Customer, Asset, Gross Amount Customer [Domain] Customer [Domain] Schedule of Inventory Schedule of Inventory, Current [Table Text Block] Leased Assets Lessee, Operating Leases [Text Block] 2027 Long-Term Debt, Maturity, Year One Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Billings in excess of costs and estimated earnings on uncompleted contracts – current Contract with Customer, Liability, Current Purchases of stock for treasury Payments for Repurchase of Common Stock Range [Axis] Statistical Measurement [Axis] Accounts receivable, held-for-sale Accounts Receivable, Held-for-Sale (Loss) gain before reclassification and tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accumulated deficit Retained Earnings (Accumulated Deficit) (Loss) Gain Recognized in AOCL Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments and Tax Restructuring and Related Activities [Abstract] Product and Service [Axis] Product and Service [Axis] Restricted cash—non-current (included within other assets) Restricted Cash, Noncurrent Debt instrument, convertible, threshold trading days Debt Instrument, Convertible, Threshold Trading Days Equity purchase agreement commitment Equity Purchase Agreement Commitment Equity Purchase Agreement Commitment Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Operating lease, cost Operating Lease, Cost Noncontrolling Interest [Abstract] Contract with customer, asset (liability), net Contract with customer, asset (liability), net Contract With Customer, Asset (Liability), Net Contract With Customer, Asset (Liability), Net Derivative Contract [Domain] Derivative Contract [Domain] 2027 Unrecorded Unconditional Purchase Obligation, to be Paid, Year One Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Schedule of Costs in Excess of Billings and Billings in Excess of Costs on Uncompleted Contracts Schedule Of Costs In Excess Of Billings And Billings In Excess Of Costs On Uncompleted Contracts [Table Text Block] Schedule Of Costs In Excess Of Billings And Billings In Excess Of Costs On Uncompleted Contracts Accounts Receivable and Allowance for Doubtful Accounts Receivable [Policy Text Block] Translation adjustment Goodwill, Foreign Currency Translation, Gain (Loss) Schedule of Convertible Debt Convertible Debt [Table Text Block] Total liabilities and stockholders’ equity Liabilities and Equity Share-Based Awards Share-Based Payment Arrangement, Option [Member] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Noncontrolling interests Equity, Attributable to Noncontrolling Interest Consecutive trading days Debt Instrument, Convertible, Consecutive Trading Days Debt Instrument, Convertible, Consecutive Trading Days Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Related Party [Domain] Related and Nonrelated Parties [Domain] Tabular List, Table Tabular List [Table Text Block] Vesting [Axis] Vesting [Axis] Additional paid-in capital Additional Paid in Capital Distributor relationships Distributor Relationships [Member] Distributor Relationships 2029 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three Effect of potentially dilutive securities - convertible debt (in shares) Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Remainder of 2026 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Remainder of Fiscal Year Furniture, fixtures, computer equipment and other Furniture, Fixtures, Computer Equipment And Other [Member] Furniture, Fixtures, Computer Equipment And Other Income tax receivable and prepaid income taxes Income Taxes Receivable, Current Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Total Accrued Expenses And Other Liabilities Current Accrued expenses and other liabilities current. Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Adjustment to Compensation: Adjustment to Compensation [Axis] Maximum exposure hedging duration Derivative, Maximum Exposure Hedging Duration Derivative, Maximum Exposure Hedging Duration Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Cumulative foreign currency translation adjustment, net of tax Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member] Hedging Designation [Axis] Hedging Designation [Axis] Restructuring and Impairment Restructuring and Related Activities Disclosure [Text Block] Name Measure Name Remaining performance obligations and other Remaining Performance Obligations And Other [Member] Remaining Performance Obligations And Other Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Additional Paid-In Capital Additional Paid-in Capital [Member] Goodwill, impairment loss Goodwill, Impairment Loss Name Trading Arrangement, Individual Name Debt instrument, overdraft facilities amount Debt Instrument, Overdraft Facilities Amount Debt Instrument, Overdraft Facilities Amount Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Raw materials Inventory, Raw Materials, Net of Reserves Schedule of Operating Lease Assets and Liabilities on Balance Sheet Schedule of Operating Lease Assets and Liabilities on Balance Sheet [Table Text Block] Schedule of Operating Lease Assets and Liabilities on Balance Sheet Company Selected Measure Amount Company Selected Measure Amount Depreciation and amortization Depreciation, Depletion and Amortization Fair market value of credit agreement Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Noncurrent Liabilities, Senior Notes Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Noncurrent Liabilities, Credit Agreement Schedule of Revenue by Timing of Recognition Schedule Of Revenue By Timing Of Recognition [Table Text Block] Schedule of revenue by timing of recognition [Table text block]. Secured Overnight Financing Rate (SOFR) Secured Overnight Financing Rate (SOFR) [Member] Adjusted SOFR Adjusted SOFR [Member] Adjusted SOFR Weighted average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Foreign currency loss (gain), net Foreign currency (gain) loss, net Gain (Loss), Foreign Currency Transaction, before Tax Total cost of revenues Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Net increase (decrease) in cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Share-based Payment Arrangement, Tranche 3 Share-Based Payment Arrangement, Tranche Three [Member] Net income attributable to Mirion Technologies, Inc. Net earnings attributable to Mirion Technologies, Inc. shareholders Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Prepaid vendor deposits Prepaid Vendor Deposits Prepaid Vendor Deposits Restatement Determination Date: Restatement Determination Date [Axis] Performance Period [Axis] Performance Period [Axis] Performance Period Schedule of Accumulated Other Comprehensive Loss, Net of Tax Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Nonemployee Share-Based Payment Arrangement, Nonemployee [Member] Debt instrument, convertible, threshold consecutive trading days Debt Instrument, Convertible, Threshold Consecutive Trading Days Measurement period Adjustments, Adjustment, Property, plant, and equipment, net Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment Basis of Presentation and Principles of Consolidation Basis Of Accounting And Principles Of Consolidation [Policy Text Block] Basis Of Accounting And Principles Of Consolidation Policy Text Block. Revenues: Revenues [Abstract] Other loss Other Income (Loss) Other Income (Loss) Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Pension and other post-retirement obligations Liability, Pension and Other Postretirement and Postemployment Benefits, Current Range [Domain] Statistical Measurement [Domain] Stock compensation to directors in lieu of cash compensation Stock Issued During Period, Value, Issued for Services Document Fiscal Year Focus Document Fiscal Year Focus Revenue, remaining performance obligation, expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Deferred and contingent consideration Deferred And Contingent Consideration, Current Deferred And Contingent Consideration, Current Customer [Axis] Customer [Axis] Customer deposits Deposits 2027 Lessee, Operating Lease, Liability, to be Paid, Year One Interest expense Interest Expense, Operating and Nonoperating Stock repurchased to satisfy tax withholding for vesting restricted stock units Payment, Tax Withholding, Share-Based Payment Arrangement Schedule of Debt Schedule of Long-Term Debt Instruments [Table Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Requisite service period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period Over time Transferred over Time [Member] Restatement Determination Date Restatement Determination Date Inventory obsolescence write down Inventory Write-down Amendment Flag Amendment Flag Total Total Restructuring Costs and Asset Impairment Charges Goodwill [Line Items] Goodwill [Line Items] Current liabilities: Liabilities, Current [Abstract] Provision for doubtful accounts Accounts Receivable, Credit Loss Expense (Reversal) Measurement period Adjustments, Deferred contract revenue Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Contract Revenue Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Contract Revenue Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Convertible business days Debt Instrument, Convertible, Business Days Debt Instrument, Convertible, Business Days Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Property, Plant, and Equipment [Abstract] Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Foreign currency translation (loss) gain, net of tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Assets Assets, Fair Value Disclosure [Abstract] Prepaid software expenses Prepaid Software Expenses Prepaid Software Expenses Notional amount Notional Amount Derivative, Notional Amount Basic (in shares) Weighted average common shares outstanding — basic (in shares) Weighted Average Number of Shares Outstanding, Basic Costs in excess of billings on uncompleted contracts Costs and estimated earnings in excess of billings on uncompleted contracts – current Contract with Customer, Asset, after Allowance for Credit Loss, Current Cumulative Impairment Goodwill, Impaired, Accumulated Impairment Loss 2030 Lessee, Operating Lease, Liability, to be Paid, Year Four Convertible debt Convertible Debt, Noncurrent Property, plant, and equipment purchases in accrued expenses and other liabilities Acquisition Purchases In Accrued Expense And Other Liabilities Acquisition Purchases In Accrued Expense And Other Liabilities Schedule of Cash Flow, Supplemental Disclosures Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Business Combination, Consideration Transferred [Abstract] Business Combination, Consideration Transferred [Abstract] Document Information [Line Items] Document Information [Line Items] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Class of Stock [Axis] Class of Stock [Axis] Net of issuance costs Debt Issuance Costs, Gross Debt Instrument Redemption [Table] Debt Instrument Redemption [Table] Summary Of Significant Accounting Policy [Line Items] Summary Of Significant Accounting Policy [Line Items] Summary of significant accounting policy. Accumulated Amortization Intangible Asset, Finite-Lived, Accumulated Amortization Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Debt, current Less: debt, current Long-Term Debt, Current Maturities Non-income taxes payable Non Income Taxes Payable, Current Non Income Taxes Payable, Current Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Capital expenditures Capital Expenditures Incurred but Not yet Paid Deferred contract revenue and liabilities Increase (Decrease) in Contract with Customer, Liability Grantee Status [Axis] Grantee Status [Axis] Loss on disposal of property, plant, and equipment Gain (Loss) on Disposition of Property Plant Equipment Noncontrolling Interests Noncontrolling Interest [Member] Amortization of debt issuance costs Amortization of Debt Issuance Costs Total expected expense over the relevant performance periods Share-based Compensation Arrangement By Share-based Payment Award Equity Instruments Grants In Period Grant Date Fair Value Share-based Compensation Arrangement By Share-based Payment Award Equity Instruments Grants In Period Grant Date Fair Value Noncontrolling Interests Noncontrolling Interest Disclosure [Text Block] Less: Segment Reporting, Reconciliation [Abstract] Long-term debt Total borrowings, net of debt issuance costs Long-Term Debt Thereafter Lessee, Operating Lease, Liability, To Be Paid, Thereafter Lessee, Operating Lease, Liability, To Be Paid, Thereafter Property, Plant and Equipment, Net Property, Plant, and Equipment [Text Block] Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Costs in excess of billings on uncompleted contracts Increase (Decrease) in Contract with Customer, Asset Conversion of Stock, Name [Domain] Conversion of Stock, Name [Domain] Security Exchange Name Security Exchange Name Nature of Business Nature Of Business [Policy Text Block] Nature Of Business Policy Text Block. Stock compensation to directors in lieu of cash compensation (in shares) Stock Issued During Period, Shares, Issued for Services Segments Segment Reporting, Policy [Policy Text Block] Schedule of Property, Plant and Equipment Property, Plant, and Equipment [Table Text Block] Statement of Comprehensive Income [Abstract] Backlog Backlog And Other [Member] Backlog And Other [Member] Name Outstanding Recovery, Individual Name Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Amortization of inventory step-up from purchase accounting Amortization Of Inventory Step-up Amortization Of Inventory Step-up Geographical [Domain] Geographical [Domain] Tax impact of capped calls related to convertible debt Adjustments to Additional Paid In Capital, Tax Impact Of Capped Calls Related To Convertible Debt Adjustments to Additional Paid In Capital, Tax Impact Of Capped Calls Related To Convertible Debt Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Measurement period Adjustments, Cash and restricted cash acquired Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash And Restricted Cash Acquired Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash And Restricted Cash Acquired 2029 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Three Total debt Gross Payments Long-Term Debt, Gross Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Percentage of voting shares (as a percent) Business Combination, Voting Equity Interest Acquired, Percentage Diluted (in shares) Weighted average common shares outstanding — diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Underlying Security Market Price Change Underlying Security Market Price Change, Percent Proceeds from lines of credit Proceeds from Lines of Credit Derivatives and Hedging Derivative Instruments and Hedging Activities Disclosure [Text Block] Thereafter Finite-Lived Intangible Asset, Expected Amortization, After Year Four Finite-Lived Intangible Asset, Expected Amortization, After Year Four Less: Imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Revenue from Contract with Customer [Abstract] Cost of revenues: Cost of Revenue [Abstract] Restricted cash Restricted cash—current (included within prepaid expenses and other current assets) Restricted Cash, Current Treasury Stock Treasury Stock, Common [Member] Intangible Asset, Goodwill and Other [Abstract] Restructuring charges (excluding impairment) Severance Costs Premium recognized on capped call transactions (as a percent) Premium Recognized On Capped Call Transactions, Percent Premium Recognized On Capped Call Transactions, Percent Total undiscounted future minimum lease payments Lessee, Operating Lease, Liability, to be Paid Common stock, number of votes per common share Common Stock, Number Of Votes Per Common Share Common Stock, Number Of Votes Per Common Share Restricted cash—current Business Combination, Recognized Asset Acquired, Restricted Cash, Current Business Combination, Recognized Asset Acquired, Restricted Cash, Current All Executive Categories All Executive Categories [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Third Anniversary Third Anniversary [Member] Third Anniversary Stock issued from treasury stock for vested restricted stock units (in shares) Stock Issued During Period, Shares, Treasury Stock Reissued Schedule of Reconciliation of Numerator and Denominator Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Debt Disclosure [Abstract] Segment Information Segment Reporting [Text Block] Minimum Minimum [Member] Schedule of Finite-lived Intangible Assets Amortization Expense Intangible Asset, Finite-Lived, Amortization Expense [Table Text Block] Income Statement Location [Axis] Location, Statement of Income, Balance [Axis] Schedule of Depreciation Expense Schedule of Depreciation Expense [Table Text Block] Schedule of Depreciation Expense Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Term loan principal repayments Repayments of Notes Payable Debt, non-current Long-Term Debt, Excluding Current Maturities And Long Term Convertible Debt Long-Term Debt, Excluding Current Maturities And Long Term Convertible Debt Business Combination [Line Items] Business Combination [Line Items] Purchases of capped calls related to convertible senior notes Payments For Capped Calls Related To Convertible Senior Notes Payments For Capped Calls Related To Convertible Senior Notes Common stock, shares authorized (in shares) Common Stock, Shares Authorized Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Exercise Price Award Exercise Price Schedule of Restructuring and Related Costs [Table] Restructuring Cost [Table] Purchases of capped calls related to convertible debt, net of tax Adjustments To Additional Paid In Capital, Purchases Of Capped Calls Adjustments To Additional Paid In Capital, Purchases Of Capped Calls Segment Reporting [Line Items] Segment Reporting [Line Items] Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Europe Europe Europe [Member] Effect of exchange rate changes on cash, cash equivalents, and restricted cash Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Principal amount for trading price Debt Instrument, Principal Amount For Trading Price Per Note Debt Instrument, Principal Amount For Trading Price Per Note Repayments of term loan Repayments of Long-Term Debt Costs and estimated earnings in excess of billings on uncompleted contracts – non-current Contract with Customer, Asset, after Allowance for Credit Loss, Noncurrent Common stock outstanding, ownership (as a percent) Common Stock Outstanding, Ownership Percentage Common Stock Outstanding, Ownership Percentage Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Restructuring reserve, beginning balance Restructuring reserve, ending balance Restructuring Reserve Equity Component [Domain] Equity Component [Domain] Adoption Date Trading Arrangement Adoption Date Debt Excluding Convertible Debt Debt Excluding Convertible Debt [Member] Debt Excluding Convertible Debt Prepaid insurance Prepaid Insurance Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Total operating lease liabilities: Total operating lease liabilities Operating Lease, Liability Warrant redemption threshold consecutive trading days Class Of Warrant Or Right Redemption Threshold Consecutive Trading Period Class of warrant or right redemption threshold consecutive trading period. Other financing Proceeds from (Payment for) Other Financing Activity Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Selling, general and administrative Selling, General and Administrative Expense Discretionary retirement plan Discretionary Retirement Plan Liabilities, Fair Value Disclosure Discretionary Retirement Plan Liabilities, Fair Value Disclosure Business Combination [Domain] Business Combination [Domain] Letter of Credit Letter of Credit [Member] Measurement period Adjustments, Accounts payable Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Payable Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Payable Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Percentage of non-voting interests not attributable portion (as a percent) Business Acquisition, Percentage Of Non-Voting Interests Not Attributable Portion Business Acquisition, Percentage Of Non-Voting Interests Not Attributable Portion Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Less: deferred financing costs Debt Issuance Costs, Noncurrent, Net Common stock Common Stock, Value, Outstanding All Adjustments to Compensation All Adjustments to Compensation [Member] Corporate and other Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Business Combination [Axis] Business Combination [Axis] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Revenue from remaining performance obligation (as a percent) Revenue, Remaining Performance Obligation, Percentage Income Statement [Abstract] Stockholders’ equity (deficit): Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Accrued Expenses and Other Current Liabilities Accrued Expenses And Other Current Liabilities [Text Block] Accrued Expenses And Other Current Liabilities Operating expenses: Operating Expenses [Abstract] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Schedule of Intangible Asset, Finite-Lived Intangible Asset, Finite-Lived [Table Text Block] Deferred contract revenue Deferred Revenue, Current Accrued commissions Accrued Sales Commission, Current City Area Code City Area Code Document Information [Table] Document Information [Table] Subsequent Events Subsequent Events [Text Block] Proceeds from net investment hedge derivative contracts Proceeds from Hedge, Investing Activities Name Forgone Recovery, Individual Name Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Schedule of Accrued Expenses and Other Current Liabilities Schedule Of Accrued Expenses And Other Current Liabilities [Table Text Block] Schedule of accrued expenses and other current liabilities [Table Text Block] Total convertible debt Convertible Debt, Current Measurement period Adjustments, Accrued expenses and other current liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accrued Expenses And Other Current Liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accrued Expenses And Other Current Liabilities Proceeds from issuance of convertible senior notes, net of issuance costs Proceeds from Convertible Debt Other assets Increase (Decrease) in Other Operating Assets Stock-based compensation expense Share-Based Payment Arrangement, Expense Inventories Business Combination, Recognized Asset Acquired, Inventory, Current Term Loan Facility Term Loan Facility [Member] Term loan facility [Member]. Contract with customer, liability, revenue recognized Contract with Customer, Liability, Revenue Recognized Income taxes payable Taxes Payable, Current Conversion of shares of class B common stock to class A common stock Conversion Of Class B Common Stock To Class A Common Stock [Member] Conversion Of Class B Common Stock To Class A Common Stock Treasury Stock Stockholders' Equity, Policy [Policy Text Block] Cash Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Financing costs Payments of Debt Issuance Costs Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net cash (used in) provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Cash Flow Hedging Cash Flow Hedging [Member] Liabilities Liabilities, Fair Value Disclosure [Abstract] Schedule of Business Acquisition, Pro Forma Information Business Combination, Pro Forma Information [Table Text Block] Research and development Research and Development Expense Adjustments to reconcile net loss to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] 2029 Long-Term Debt, Maturity, Year Three Business Combination, Separately Recognized Transaction [Line Items] Business Combination, Separately Recognized Transaction [Line Items] FINANCING ACTIVITIES: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Property, plant, and equipment, net Property, plant and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Line of credit facility, unused capacity, commitment fee (as a percent) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Certrec Corporation Certrec Corporation [Member] Certrec Corporation Derivative asset Total assets Derivative Asset Inventories Inventory Disclosure [Text Block] Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Goodwill and Intangible Assets Intangible Asset and Goodwill [Text Block] Underlying Securities Award Underlying Securities Amount Less: Comprehensive (loss) income attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items] Inventories Increase (Decrease) in Inventories Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Segment Reporting [Table] Segment Reporting [Table] Number of shares available for grant (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Schedule of Lease, Cost Lease, Cost [Table Text Block] Other current assets Other Assets, Current Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Uncompleted Contracts Uncompleted Contracts [Member] Uncompleted Contracts Asia Pacific Asia Pacific Asia Pacific [Member] Current Fiscal Year End Date Current Fiscal Year End Date 2030 Thereafter Long-Term Debt, Maturity, After Year Four Long-Term Debt, Maturity, After Year Four Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Derivative [Line Items] Derivative [Line Items] Purchases of treasury stock (in shares) Stock Repurchased During Period, Shares Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Total Unrecorded Unconditional Purchase Obligation Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Gain reclassification before tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Severance and employee costs Restructuring Costs Measure: Measure [Axis] Treasury stock, common (in shares) Beginning balance (in shares) Ending balance (in shares) Treasury Stock, Common, Shares Number of performance period Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Performance Period Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Performance Period Measurement period Adjustments, Deferred income taxes, non-current Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Income Taxes, Non-Current Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Income Taxes, Non-Current Interest rate (as a percent) Long-Term Debt, Percentage Bearing Variable Interest, Percentage Rate Equity Components [Axis] Equity Components [Axis] Costs incurred on contracts (from inception to completion) Capitalized Contract Cost, Net Stock Conversion Description [Axis] Stock Conversion Description [Axis] Class A Common Stock Common Class A [Member] Entity Interactive Data Current Entity Interactive Data Current Variable Rate [Axis] Variable Rate [Axis] Income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Nuclear & Safety Nuclear & Safety Segment [Member] Nuclear & Safety Segment Entity Small Business Entity Small Business Comprehensive income (loss) attributable to Mirion Technologies, Inc. stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent 2030 and thereafter Unrecorded Unconditional Purchase Obligation, To Be Paid, Thereafter Unrecorded Unconditional Purchase Obligation, to be Paid, Thereafter Original Average Life in Years Intangible Asset, Finite-Lived, Acquired, Weighted-Average Amortization Period Property, Plant, and Equipment [Line Items] Property, Plant, and Equipment [Line Items] Performance Period [Domain] Performance Period [Domain] Performance Period [Domain] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other assets Other Assets, Noncurrent Document Type Document Type Acquisitions of businesses, net of cash and cash equivalents acquired Gross purchase consideration GAAP purchase consideration, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Debt Instrument, Redemption [Line Items] Debt Instrument, Redemption [Line Items] Loss on debt extinguishment Loss on debt extinguishment Loss on partial debt extinguishment Gain (Loss) on Extinguishment of Debt Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Billings in excess of costs and estimated earnings on uncompleted contracts – non-current Contract with Customer, Liability, Noncurrent Net Investment Hedging Net Investment Hedging [Member] Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Four Anniversary Four Anniversary [Member] Four Anniversary Commitments and contingencies (Note 11) Commitments and Contingencies Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Property, plant and equipment, gross Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] 2030 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Four Machinery and equipment Machinery and Equipment [Member] Executive Category: Executive Category [Axis] Business Combinations, Acquisitions, and Business Disposals Business Combination [Policy Text Block] Point in time Transferred at Point in Time [Member] LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Inventories Inventories Inventory, Net Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Leverage ratio Leverage Ratio Leverage Ratio Cash Paid For: Supplemental Cash Flow Information [Abstract] Measurement period Adjustments, Costs in excess of billings Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Costs In Excess Of Billings Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Costs In Excess Of Billings PEO Name PEO Name Accrued expenses and other current liabilities Accrued Liabilities and Other Liabilities Leasehold Improvements Leasehold Improvements [Member] Cash paid for income taxes Income Tax Paid, before Refund Received Other segment items Segment Reporting, Other Segment Item, Amount Less: cash and restricted cash acquired Cash Acquired from Acquisition Long-Lived Asset, Class [Axis] Long-Lived Asset, Class [Axis] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Product Concentration Risk Product Concentration Risk [Member] Revenue Recognition Revenue [Policy Text Block] Accounts payable Increase (Decrease) in Accounts Payable Other accrued expenses Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Derivative cross currency duration Derivative Cross Currency Duration Derivative Cross Currency Duration Summary Of Significant Accounting Policy [Table] Summary Of Significant Accounting Policy [Table] Summary Of Significant Accounting Policy [Table] Net tangible assets acquired Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Tangible Assets Acquired Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Tangible Assets Acquired Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] Other liabilities, non-current Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Conversion of shares of class B common stock to class A common stock (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Schedule of Derivative Instruments in Statement of Financial Position, Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Basic (in dollars per share) Net earnings per common share attributable to Mirion Technologies, Inc. — basic (in dollars per share) Earnings Per Share, Basic Amortization expense Amortization Expense Of The Deferred Finance Cost Amortization expense of the deferred finance cost. Total current assets Assets, Current Insider Trading Arrangements [Line Items] Debt, non-current Long-Term Debt, Excluding Current Maturities Accounts receivable, net of allowance for doubtful accounts Accounts Receivable, after Allowance for Credit Loss, Current Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] 2021 Credit Agreement Two Thousand And Twenty One Credit Agreement [Member] Two Thousand And Twenty One Credit Agreement Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Nature of Business and Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Cover [Abstract] Contract asset balance (as a percent) Concentration Risk, Percentage Equity Awards Adjustments Equity Awards Adjustments [Member] Hedging Relationship [Domain] Hedging Relationship [Domain] Other non-current liabilities Derivative Liability, Noncurrent Other Notes Payable, Other Payables [Member] Measurement period Adjustments, Total amortizable intangible assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles Other liabilities Increase (Decrease) in Other Operating Liabilities Plan Name [Axis] Plan Name [Axis] Inventory Disclosure [Abstract] Other (income) expense, net Other expense, net Other Nonoperating Income (Expense) Conversion of shares of class B common stock to class A common stock Stock Issued During Period, Value, Conversion of Convertible Securities IntermediateCo Class B common stock IntermediateCo Class B common stock [Member] IntermediateCo Class B common stock [Member] Hedging Designation [Domain] Hedging Designation [Domain] Class of Stock [Domain] Class of Stock [Domain] Segment income from operations Segment Income From Operations Segment Income From Operations Statement of Cash Flows [Abstract] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Measurement period Adjustments, Prepaid expenses and other currents assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Prepaid Expenses And Other Currents Assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Prepaid Expenses And Other Currents Assets Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Measurement period Adjustments, GAAP purchase consideration, net of cash acquired Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, GAAP Purchase Consideration, Net Of Cash Acquired Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, GAAP Purchase Consideration, Net Of Cash Acquired Other Other Noncash Income (Expense) Conversion premium (as a percent) Debt Instrument, Convertible, Conversion Premium Debt Instrument, Convertible, Conversion Premium Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Purchase consideration Business Combination, Consideration Transferred Entity Filer Category Entity Filer Category Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Elements [Abstract] Measurement period Adjustments, Restricted cash—current Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Restricted Cash Current Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Restricted Cash Current Paragon Paragon Corporation [Member] Paragon Corporation Cancer care Cancer Care [Member] Cancer Care Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Net income Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Current assets: Assets, Current [Abstract] Swaps rates Total liabilities Derivative Liability Total revenues Business Combination, Pro Forma Information, Pro Forma Revenue Entity Address, Address Line One Entity Address, Address Line One Right-of-use asset obtained in exchange for operating lease liability Right-of-Use Asset Obtained in Exchange for Operating Lease Liability North America North America North America [Member] Income tax expense (benefit) Income Tax Expense (Benefit) Supplemental Disclosures to Consolidated Statements of Cash Flows [Abstract] Supplemental Disclosures to Consolidated Statements of Cash Flows [Abstract] Supplemental Disclosures to Consolidated Statements of Cash Flows [Abstract] Measurement period Adjustments, Accounts receivable, net Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Receivable, Net Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Receivable, Net Deferred income taxes, non-current Business Combination, Recognized Liability Assumed, Deferred Tax Liability Damages subject to daily penalty accrual Loss Contingency, Damages Sought Subject To Daily Penalty Accrual Loss Contingency, Damages Sought Subject To Daily Penalty Accrual Statement [Table] Statement [Table] Share-based Payment Arrangement, Tranche 2 Share-Based Payment Arrangement, Tranche Two [Member] Interest income Interest income Investment Income, Interest Loss (gain) on foreign currency transactions Unrealized Gain (Loss), Foreign Currency Transaction, before Tax Non-Cash Investing and Financing Activities: Other Noncash Investing and Financing Items [Abstract] Damages sought, value Loss Contingency, Damages Sought, Value 2026 Unrecorded Unconditional Purchase Obligation, to be Paid, Remainder of Fiscal Year Prepaid expenses and other currents assets Business Combination, Recognized Asset Acquired, Prepaid Expense and Other Asset, Current Derivative Instruments and Hedging Activities Disclosure [Abstract] Contracts in Progress Long-Term Contracts or Programs Disclosure [Text Block]