1001 - Document - Cover link:presentationLink link:definitionLink link:calculationLink 1002 - Statement - Statements of Net Assets Available for Benefits link:presentationLink link:definitionLink link:calculationLink 1003 - Statement - Statement of Changes in Net Assets Available for Benefits link:presentationLink link:definitionLink link:calculationLink 1004 - Disclosure - Description of plan link:presentationLink link:definitionLink link:calculationLink 1005 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:definitionLink link:calculationLink 1006 - Disclosure - Rights Upon Plan Termination link:presentationLink link:definitionLink link:calculationLink 1007 - Disclosure - Fair Value Measurements link:presentationLink link:definitionLink link:calculationLink 1008 - Disclosure - Party-In-Interest Transactions link:presentationLink link:definitionLink link:calculationLink 1009 - Disclosure - Tax Status link:presentationLink link:definitionLink link:calculationLink 1010 - Disclosure - Reconciliation of Financial Statements to Form 5500 link:presentationLink link:definitionLink link:calculationLink 1011 - Disclosure - Subsequent Events link:presentationLink link:definitionLink link:calculationLink 1012 - Disclosure - Schedule H, Line 4a - Schedule Of Delinquent Participant Contributions link:presentationLink link:definitionLink link:calculationLink 1013 - Disclosure - Schedule H, Line 4i - Schedule of Assets (Held at End of Year) link:presentationLink link:definitionLink link:calculationLink 1014 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:definitionLink link:calculationLink 1015 - Disclosure - Summary of Significant Accounting Policies (Tables) link:presentationLink link:definitionLink link:calculationLink 1016 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:definitionLink link:calculationLink 1017 - Disclosure - Reconciliation of Financial Statements to Form 5500 (Tables) link:presentationLink link:definitionLink link:calculationLink 1018 - Disclosure - Description of Plan - Additional Information (Details) link:presentationLink link:definitionLink link:calculationLink 1019 - Disclosure - Summary of Significant Accounting - Summary of EBP, Risk and Uncertainty Policies (Details) link:presentationLink link:definitionLink link:calculationLink 1020 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details) link:presentationLink link:definitionLink link:calculationLink 1021 - Disclosure - Rights Upon Plan Termination - Additional Information (Details) link:presentationLink link:definitionLink link:calculationLink 1022 - Disclosure - Fair Value Measurements - Summary of Fair Value of the Plan's Investments (Detail) link:presentationLink link:definitionLink link:calculationLink 1023 - Disclosure - Party-In-Interest Transactions - Additional Information (Details) link:presentationLink link:definitionLink link:calculationLink 1024 - Disclosure - Tax Status - Additional Information (Details) link:presentationLink link:definitionLink link:calculationLink 1025 - Disclosure - Reconciliation of Financial Statements to Form 5500 - Summary of Reconciliation of Net Assets Available For Benefits to Form 5500 (Details) link:presentationLink link:definitionLink link:calculationLink 1026 - Disclosure - Reconciliation of Financial Statements to Form 5500 - Summary of Reconciliation of Change in Net Assets Available For Benefits to Net Income Form 5500 (Details) link:presentationLink link:definitionLink link:calculationLink 1027 - Disclosure - Subsequent Events - Additional Information (Details) link:presentationLink link:definitionLink link:calculationLink 1028 - Disclosure - Schedule H, Line 4a - Schedule of Delinquent Participant Contributions (Details) link:presentationLink link:definitionLink link:calculationLink 1029 - Disclosure - Schedule H, Line 4i - Schedule of Assets (Held at End of Year) (Details) link:presentationLink link:definitionLink link:calculationLink 1030 - Disclosure - Schedule H, Line 4i - Schedule of Assets (Held at End of Year) (Details) Alternate link:presentationLink link:definitionLink link:calculationLink Cover [Abstract] Document Information [Table] Legal Entity [Axis] Entity [Domain] EBP 002 [Member] Document Information [Line Items] Document Type Amendment Flag Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date EBP, Statement of Net Asset Available for Benefit [Abstract] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Receivable [Abstract] Receivables EBP, Note Receivable from Participant Notes receivable from participants EBP, Participant Contribution, Receivable Participant contributions EBP, Receivable Total receivables Employee Benefit Plan Employer Profit Sharing Contribution Receivable Employer profit sharing contributions Employee benefit plan employer profit sharing contribution receivable. Employee Benefit Plan Employer Matching Contribution Receivable Employee benefit plan employer matching contribution receivable. EBP, Net Asset Available for Benefit NET ASSETS AVAILABLE FOR BENEFITS Beginning of year End of year Net assets available for benefits per the financial statements EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Investments, at fair value (Note 4) Investments at fair value EBP, investment, excluding plan interest in master trust, fair value EBP, Statement of Change in Net Asset Available for Benefit [Abstract] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Change in Net Asset Available for Benefit, Increase [Abstract] Additions to net assets available for benefits attributable to: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] Investment income EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment Interest and dividends EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Net appreciation in fair value of investments EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Net investment income EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Interest income on notes receivable from participants EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Contributions EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash Employer EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Participant EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Rollovers EBP, Change in Net Asset Available for Benefit, Increase from Contribution Total contributions EBP, Change in Net Asset Available for Benefit, Increase Net additions EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Deductions from net assets available for benefits attributable to: EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Benefits paid to participants EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Administrative expenses EBP, Change in Net Asset Available for Benefit, Decrease Total deductions EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Net increase in net assets available for benefits Increase in net assets before plan transfers per the financial statements EBP, Description of Plan and Accounting Change [Abstract] EBP, Description of Plan [Table] EBP, Description of Plan [Line Items] EBP, Description of Plan [Text Block] Description of plan EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] EBP, Accounting Policy [Table] EBP, Accounting Policy [Line Items] EBP, Summary of Accounting Policy [Text Block] Summary of Significant Accounting Policies EBP, Plan Termination [Text Block] Rights Upon Plan Termination EBP, Investment, Fair Value and NAV [Abstract] EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Text Block] Fair Value Measurements EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Text Block] Party-In-Interest Transactions EBP, Tax Status [Abstract] EBP, Tax Status [Table] EBP, Tax Status [Line Items] EBP, Tax Status [Text Block] Tax Status EBP, Reconciliation of Financial Statement to Form 5500 [Abstract] EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Reconciliation of Financial Statement to Form 5500 [Text Block] Reconciliation of Financial Statements to Form 5500 EBP, Subsequent Event [Abstract] EBP, Subsequent Event [Table] EBP, Subsequent Event [Line Items] EBP, Subsequent Event [Text Block] Subsequent Events EBP, Schedule of Delinquent Participant Contribution [Abstract] EBP, Schedule of Delinquent Participant Contribution [Table] EBP, Schedule of Delinquent Participant Contribution [Line Items] EBP, Schedule of Delinquent Participant Contribution [Table Text Block] Schedule H, Line 4a – Schedule Of Delinquent Participant Contributions EBP, Schedule of Asset Held for Investment [Abstract] EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Table Text Block] Schedule H, Line 4(i) Schedule of Assets (Held at End of Year) EBP, Basis of Accounting [Policy Text Block] Basis of Accounting EBP, Use of Estimate [Policy Text Block] Use of Estimates EBP, Risk and Uncertainty [Policy Text Block] Risks and Uncertainties Employee Benefit Plan Concentrations Of Investments [Policy Text Block] Concentrations of Investments Employee benefit plan concentrations of investments. EBP, Investment [Policy Text Block] Investment Valuation and Income Recognition EBP, Note Receivable from Participant [Policy Text Block] Notes Receivable from Participants EBP, Expense [Policy Text Block] Administrative Expenses EBP, Payment to Participant [Policy Text Block] Payment of Benefits EBP, Risk and Uncertainty [Table Text Block] Summary of EBP, Risk and Uncertainty EBP, Investment, Fair Value and NAV [Table Text Block] Summary of Fair Value of the Plan's Investments EBP, Reconciliation of Financial Statement to Form 5500 [Table Text Block] Summary of Reconciliation of Net Assets Available For Benefits to Form 5500 Employee Benefit Plan Reconciliation Of Net Increase In Net Assets As Per Form 5500 [Table Text Block] Summary of Reconciliation of Change in Net Assets Available For Benefits to Net Income Form 5500 Employee benefit plan reconciliation of net increase in net assets as per form 5500. EBP Participant Age Required For Participation Eligibility EBP, Participant age required for participation eligibility EBP participant age required for participation eligibility. EBP Days Of Service Required For Participation Eligibility EBP, Days of service required for participation eligibility EBP days of service required for participation eligibility. EBP Employer Matching Contributions Participation Eligibility Service Years EBP, Employer matching contributions participation eligibility service years EBP employer matching contributions participation eligibility service years. EBP Employer Profit Sharing Contributions Participation Eligibility Service Years EBP, Employer profit sharing contributions participation eligibility service years EBP employer profit sharing contributions participation eligibility service years. EBP Employer Profit Sharing Contributions Participation Eligibility Service Hours EBP, Employer profit sharing contributions participation eligibility service hours EBP employer profit sharing contributions participation eligibility service hours. EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage EBP, Participant contribution, pretax, maximum annual compensation to total compensation, percentage EBP, Participant Contribution, Automatic, Deferral Rate EBP, Participant contribution, automatic, deferral rate EBP, Employer Contribution, Matching Percentage EBP, Employer contribution, matching percentage EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Employer contribution, participant compensation matched, percentage Employee Benefit Plan Participant Retirement Disability Or Death Vesting Percentage Employee benefit plan participant retirement disability or death vesting percentage Employee benefit plan participant retirement disability or death vesting percentage. EBP Employer Profit Sharing Contributions Vesting Period EBP, Employer profit sharing contributions vesting period EBP, employer profit sharing contributions, vesting period. EBP Employer Profit Sharing Contributions Vesting Percentage EBP, Employer profit sharing contributions vesting percentage EBP employer profit sharing contributions vesting percentage. EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount EBP, Note receivable from participant, account, minimum borrowing, amount Employee Benefit Plan Note Receivable From Participant Account Maximum Borrowing Amount Description Employee benefit plan note receivable from participant account maximum borrowing amount description Employee benefit plan note receivable from participant account maximum borrowing amount description. Employee Benefit Plan Note Receivable From Participant Account Borrowing Standardize Percentage Employee benefit plan note receivable from participant account borrowing standardize percentage. Employee benefit plan note receivable from participant account borrowing standardize percentage. EBP, Forfeited Nonvested Account EBP, Forfeited nonvested account EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Ebp, Forfeited nonvested account, decrease from employer contribution EBP, Risk and Uncertainty, Concentration of Investment at Fair Value to Total Investments, Percentage EBP, Risk and uncertainty, concentration of investment at fair value to total investments, percentage EBP, Risk and Uncertainty, Concentration of Investment, Benchmark Threshold Percentage EBP, Risk and uncertainty, concentration of investment, benchmark threshold percentage Investment Type [Axis] Investments [Domain] FIAM Blend Target Date Fund 2030 Class C [Member] FIAM Blend Target Date Fund 2035 Class C [Member] Employee Benefit Plan Offset Of Plan Expenses Employee benefit plan offset of plan expenses Employee benefit plan offset of plan expenses. Employee Benefit Plan, Undistributed Administrative Revenue Employee benefit plan, undistributed administrative revenue Employee benefit plan, undistributed administrative revenue. EBP, Accrued Expense EBP, accrued expense Employee Benefit Plan Plan Termination Vesting Percentage Employee benefit plan plan termination vesting percentage Employee benefit plan plan termination vesting percentage. EBP, Asset Total assets in fair value hierarchy EBP, Employer, Common Stock [Member] CRH plc common stock [Member] Mutual Fund [Member] Mutual funds [Member] EBP, Self-Directed Brokerage Account [Member] Self-directed brokerage accounts [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value, Inputs, Level 1 [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Fair Value Measured at Net Asset Value Per Share [Member] Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] EBP, Investment, Number of Shares EBP, Investment, number of shares EBP, Investment, Excluding Plan Interest in Master Trust, Cost EBP, Investment, excluding plan interest in master trust, cost EBP, Investment Acquired, Excluding Plan Interest in Master Trust, Cost EBP, Investment acquired, excluding plan interest in master trust, cost. EBP, Investment Sold, Excluding Plan Interest in Master Trust, Selling Price EBP, investment sold, excluding plan interest in master trust, selling price EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment EBP, change in net asset available for benefit, increase from dividend income on investment EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Unrealized Gain (Loss) on Investment EBP, change in net asset available for benefit, increase (decrease) from unrealized gain (loss) on investment EBP, Related Party and Party-in-Interest [Axis] EBP, Related Party and Party-in-Interest [Domain] EBP, Employer, Principal Holder [Member] CRH plc [Member] EBP, Tax Determination Letter, Date EBP, Tax determination letter, date EBP, Schedule of Delinquent Participant Contribution, Transferred Late to Plan EBP, Schedule of delinquent participant contribution, transferred late to plan EBP, Reconciliation to Form 5500, Net Asset Available for Benefit, Deemed Distribution Deemed distributions Deemed distributions EBP, Form 5500 Caption, Net Assets Net assets per Form 5500 Employee Benefit Plan Form 500 Caption Change In Net Asset Available For Benefit Change in Net Assets per Form 5500 Employee benefit plan form 500 caption change in net asset available for benefit. EBP, Reconciliation to Form 5500, Change in Net Asset Available for Benefit, Increase (Decrease) from Deemed Distribution Change in deemed distributions EBP, Subsequent Event, Description EBP, Subsequent event, description EBP, Change in Net Asset Available for Benefit, Transfer to (from) Plan EBP, Change in net asset available for benefit, transfer to (from) plan Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event [Member] Entity Tax Identification Number EBP, Plan Number EBP, Schedule of Delinquent Participant Contribution, Pending Correction in VFCP Statistical Measurement [Axis] Statistical Measurement [Domain] Maximum [Member] Minimum [Member] Investment, Identifier [Axis] Investment, Issuer Name [Axis] Investment, Issuer Name [Domain] Common Collective Trust [Member] Other [Member] EBP, Employer, Common Stock Fund [Member] EBP, Participant-Directed and Nonparticipant-Directed Status [Axis] EBP, Participant-Directed and Nonparticipant-Directed Status [Domain] EBP, Investment, Issuer Name [Extensible Enumeration] EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Investment, Current Value, Type [Extensible Enumeration] EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution EBP, Asset Held for Investment EBP, Asset Held for Investment, Party-in-Interest [true false] EBP, Asset Held for Investment, Participant Loan, Interest Rate Boston TR SM CAP RET [Member] Common Stock [Member] EuroPac Growth R6 [Member] FIAM Blend Target Date Fund 2010 ClassC [Member] FIAM Blend Target Date Fund 2015 ClassC [Member]