Entity Central Index Key Document And Company Information. Document And Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Intangible assets operating permits net. Statement Of Financial Position [Abstract] ASSETS Assets [Abstract] Current Assets: Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Accounts receivable, net Accounts And Other Receivables Net Current Inventories, net Inventory Net Other current assets Other Assets Current Total Current Assets Assets Current Property, plant and equipment Property Plant And Equipment Gross Allowances for depreciation, depletion and amortization Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Net property, plant and equipment Property Plant And Equipment Net Goodwill Goodwill Operating permits, net Intangible Assets Operating Permits Net Other intangibles, net Other Intangible Assets Net Other noncurrent assets Other Assets Noncurrent Total Assets Assets LIABILITIES AND EQUITY Liabilities And Stockholders Equity [Abstract] Current Liabilities: Liabilities Current [Abstract] Accounts payable Accounts Payable Current Accrued salaries, benefits and payroll taxes Employee Related Liabilities Current Pension and postretirement benefits Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Current Accrued insurance and other taxes Accrual For Taxes Other Than Income Taxes Current Current maturities of long-term debt and short-term facilities Long Term Debt Current Accrued interest Interest Payable Current Other current liabilities Other Liabilities Current Total Current Liabilities Liabilities Current Long-term debt Long Term Debt Noncurrent Pension, postretirement and postemployment benefits Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent Deferred income taxes, net Deferred Tax Liabilities Noncurrent Other noncurrent liabilities Other Liabilities Noncurrent Total Liabilities Liabilities Equity: Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Abstract] Common stock, par value $0.01 per share Common Stock Value Preferred stock, par value $0.01 per share Preferred Stock Value Additional paid-in capital Additional Paid In Capital Common Stock Accumulated other comprehensive loss Accumulated Other Comprehensive Income Loss Net Of Tax Retained earnings Retained Earnings Accumulated Deficit Total Shareholders' Equity Stockholders Equity Noncontrolling interests Minority Interest Total Equity Stockholders Equity Including Portion Attributable To Noncontrolling Interest Total Liabilities and Equity Liabilities And Stockholders Equity Common stock, par value Common Stock Par Or Stated Value Per Share Preferred stock, par value Preferred Stock Par Or Stated Value Per Share Sales revenue goods and services net. Cost of revenues products and services. Income Statement [Abstract] Products and services revenues Sales Revenue Goods And Services Net Freight revenues Shipping And Handling Revenue Total Revenues Sales Revenue Net Cost of revenues - products and services Cost Of Revenues Products And Services Cost of revenues - freight Shipping Handling And Transportation Costs Total Cost of Revenues Cost Of Goods And Services Sold Gross Profit Gross Profit Selling, general & administrative expenses Selling General And Administrative Expense Acquisition-related expenses Business Combination Acquisition Related Costs Other operating expense, net Other Operating Income Expense Net Earnings from Operations Operating Income Loss Interest expense Interest Expense Other nonoperating income, net Other Nonoperating Income Expense Earnings before income tax expense Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income tax expense Income Tax Expense Benefit Consolidated net earnings Profit Loss Less: Net earnings (loss) attributable to noncontrolling interests Net Income Loss Attributable To Noncontrolling Interest Net Earnings Attributable to Martin Marietta Materials, Inc. Net Income Loss Consolidated Comprehensive Earnings: (See Note 1) Comprehensive Income Net Of Tax [Abstract] Earnings attributable to Martin Marietta Materials, Inc. Comprehensive Income Net Of Tax Earnings (Loss) attributable to noncontrolling interests Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest Net Earnings Attributable to Martin Marietta Materials, Inc. Per Common Share: Earnings Per Share [Abstract] Basic attributable to common shareholders Earnings Per Share Basic Diluted attributable to common shareholders Earnings Per Share Diluted Weighted-Average Common Shares Outstanding: Weighted Average Number Of Shares Outstanding [Abstract] Basic Weighted Average Number Of Shares Outstanding Basic Diluted Weighted Average Number Of Diluted Shares Outstanding Cash Dividends Per Common Share Common Stock Dividends Per Share Cash Paid Statement Of Cash Flows [Abstract] Cash Flows from Operating Activities: Net Cash Provided By Used In Operating Activities [Abstract] Consolidated net earnings Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest Adjustments to reconcile consolidated net earnings to net cash provided by operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Depreciation, depletion and amortization Depreciation Depletion And Amortization Stock-based compensation expense Share Based Compensation (Gain) Loss on divestitures and sales of assets Gain Loss On Disposition Of Assets Deferred income taxes Deferred Income Tax Expense Benefit Other items, net Other Noncash Income Expense Changes in operating assets and liabilities, net of effects of acquisitions and divestitures: Increase Decrease In Operating Capital [Abstract] Accounts receivable, net Increase Decrease In Accounts Receivable Inventories, net Increase Decrease In Inventories Accounts payable Increase Decrease In Accounts Payable Trade Other assets and liabilities, net Increase Decrease In Other Operating Capital Net Net Cash Provided by Operating Activities Net Cash Provided By Used In Operating Activities Cash Flows from Investing Activities: Net Cash Provided By Used In Investing Activities [Abstract] Additions to property, plant and equipment Payments To Acquire Property Plant And Equipment Proceeds from divestitures and sales of assets Proceeds From Sales Of Business Affiliate And Productive Assets Payment of railcar construction advances Repayments Of Advances For Construction Reimbursement of railcar construction advances Proceeds From Advances For Construction Investments in life insurance contracts, net Proceeds From Life Insurance Policies Net Cash Used for Investing Activities Net Cash Provided By Used In Investing Activities Cash Flows from Financing Activities: Net Cash Provided By Used In Financing Activities [Abstract] Borrowings of debt Proceeds From Issuance Of Debt Repayments of debt Repayments Of Debt Payments on capital lease obligations Repayments Of Long Term Capital Lease Obligations Debt issuance costs Payments Of Debt Issuance Costs Contributions by owners of noncontrolling interest Proceeds From Minority Shareholders Dividends paid Payments Of Dividends Common Stock Proceeds from exercise of stock options Proceeds From Stock Options Exercised Shares withheld for employees' income tax obligations Payments Related To Tax Withholding For Share Based Compensation Repurchases of common stock Payments For Repurchase Of Common Stock Net Cash (Used for) Provided by Financing Activities Net Cash Provided By Used In Financing Activities Net (Decrease) Increase in Cash and Cash Equivalents Cash And Cash Equivalents Period Increase Decrease Cash and Cash Equivalents, beginning of period Cash and Cash Equivalents, end of period Statement Of Stockholders Equity [Abstract] Statement [Table] Statement [Table] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid In Capital [Member] Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Income [Member] Retained Earnings Retained Earnings [Member] Total Shareholders' Equity Parent [Member] Noncontrolling Interests Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Beginning Balance Beginning Balance (in shares) Common Stock Shares Outstanding Consolidated net earnings Other comprehensive earnings, net of tax Other Comprehensive Income Loss Net Of Tax Dividends declared Dividends Common Stock Cash Issuances of common stock for stock award plans Stock Issued During Period Value Share Based Compensation Issuances of common stock for stock award plans (in shares) Stock Issued During Period Shares Share Based Compensation Repurchases of common stock Stock Repurchased During Period Value Repurchases of common stock, (in shares) Stock Repurchased During Period Shares Shares withheld for employees' income tax obligations Adjustments Related To Tax Withholding For Share Based Compensation Stock-based compensation expense Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Contributions from owners of noncontrolling interest Noncontrolling Interest Increase From Subsidiary Equity Issuance Ending Balance Ending Balance (in shares) Accounting Policies [Abstract] Significant Accounting Policies Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [Text Block] Revenue From Contract With Customer [Abstract] Revenue Recognition Revenue From Contract With Customer [Text Block] Inventory Disclosure [Abstract] Inventories, Net Inventory Disclosure [Text Block] Debt Disclosure [Abstract] Long-Term Debt Debt Disclosure [Text Block] Financial instruments disclosure. Financial Instruments Disclosure [Abstract] Financial Instruments Financial Instruments Disclosure [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Compensation And Retirement Disclosure [Abstract] Pension and Postretirement Benefits Pension And Other Postretirement Benefits Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Segment Reporting [Abstract] Business Segments Segment Reporting Disclosure [Text Block] Revenues and gross profit. Revenues and gross profit. Revenues And Gross Profit [Abstract] Revenues and Gross Profit Revenues And Gross Profit [Text Block] Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Information Cash Flow Supplemental Disclosures [Text Block] Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Organization policy. Organization Organization Policy [Text Block] Basis of Presentation Basis Of Accounting Policy Policy [Text Block] New Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Pending accounting pronouncements. Pending Accounting Pronouncement Pending Accounting Pronouncements Policy Policy [Text Block] Consolidated Comprehensive Earnings/Loss and Accumulated Other Comprehensive Loss Comprehensive Income Policy Policy [Text Block] Earnings per Common Share Earnings Per Share Policy [Text Block] Significant accounting policies. Significant accounting policies. Significant Accounting Policies [Table] Significant Accounting Policies [Table] Parent Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Comprehensive Earnings Schedule Of Comprehensive Income Loss Table [Text Block] Changes in Accumulated Other Comprehensive Earnings (Loss), Net of Tax Schedule Of Accumulated Other Comprehensive Income Loss Table [Text Block] Noncurrent deferred tax assets recorded in accumulated other comprehensive loss. Noncurrent Deferred Tax Assets Recorded In Accumulated Other Comprehensive Loss Noncurrent Deferred Tax Assets Recorded In Accumulated Other Comprehensive Loss Table [Text Block] Reclassification Out of Accumulated Other Comprehensive Loss Reclassification Out Of Accumulated Other Comprehensive Income Table [Text Block] Basic and Diluted Earnings Per Common Share Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Schedule of Company's Total Revenues by Category for each Reportable Segment Schedule Of Revenue By Major Customers By Reporting Segments Table [Text Block] Summary of Information About the Company's Contract Balances Contract With Customer Asset And Liability Table [Text Block] Schedule of Inventories Net Schedule Of Inventory Current Table [Text Block] Long-Term Debt Schedule Of Debt Instruments [Text Block] Schedule of Components of Net Periodic Benefit Cost (Credit) Schedule Of Net Benefit Costs Table [Text Block] Financial Data for Continuing Operation for Company's Reportable Business Segments Schedule Of Segment Reporting Information By Segment [Text Block] Total Revenues and Gross Profit by Product Line Schedule Of Entity Wide Information Revenue From External Customers By Products And Services [Text Block] Components of Change in Other Assets and Liabilities, Net Cash Flow Operating Capital Table [Text Block] Schedule Of Other Significant Noncash Transactions Schedule Of Other Significant Noncash Transactions [Text Block] Supplemental Disclosures of Cash Flow Information Schedule Of Cash Flow Supplemental Disclosures Table [Text Block] Number of quarries and yards. Number of states with aggregates business sales by destination. Adjustments for New Accounting Pronouncements Adjustments For New Accounting Pronouncements [Axis] Type of Adoption Type Of Adoption [Member] ASU 2016-15 Accounting Standards Update201615 [Member] Number of quarries and yards Number Of Quarries And Yards Number of states with aggregates business sales by destination Number Of States With Aggregates Business Sales By Destination Number of reportable segments Number Of Reportable Segments Settlement proceeds from and premiums paid for corporate-owned life insurance policies reclassified from operating activity to investing activity Payments For Proceeds From Life Insurance Policies Statement Of Income And Comprehensive Income [Abstract] Net earnings attributable to Martin Marietta Materials, Inc. Other comprehensive earnings, net of tax Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Net earnings (loss) attributable to noncontrolling interests Other comprehensive earnings, net of tax Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest Comprehensive earnings (loss) attributable to noncontrolling interests Accumulated Other Comprehensive Income Loss [Table] Accumulated Other Comprehensive Income Loss [Table] Pension and Postretirement Benefit Plans Accumulated Defined Benefit Plans Adjustment [Member] Foreign Currency Accumulated Translation Adjustment [Member] Unamortized Value of Terminated Forward Starting Interest Rate Swap Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income Loss [Line Items] Other comprehensive earnings (loss) before reclassifications, net of tax Other Comprehensive Income Loss Before Reclassifications Net Of Tax Amounts reclassified from accumulated other comprehensive earnings, net of tax Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax Other comprehensive earnings (loss), net of tax Accumulated other comprehensive loss, noncurrent deferred tax assets, other comprehensive earnings, tax effect, pension and postretirement benefit plans. Accumulated other comprehensive loss, noncurrent deferred tax assets, pension and postretirement benefit plans. Equity [Abstract] Balance at beginning of period, Pension and Postretirement Benefit Plans Accumulated Other Comprehensive Loss Noncurrent Deferred Tax Assets Pension And Postretirement Benefit Plans Tax effect of other comprehensive earnings, Pension and Postretirement Benefit Plans Accumulated Other Comprehensive Loss Noncurrent Deferred Tax Assets Other Comprehensive Earnings Tax Effect Pension And Postretirement Benefit Plans Balance at end of period, Pension and Postretirement Benefit Plans Accumulated other comprehensive loss, noncurrent deferred tax assets, other comprehensive earnings, tax effect, unamortized value of terminated forward starting interest rate swap. Accumulated other comprehensive loss, noncurrent deferred tax assets, unamortized value of terminated forward starting interest rate swap. Balance at beginning of period, Unamortized Value of Terminated Forward Starting Interest Rate Swap Accumulated Other Comprehensive Loss Noncurrent Deferred Tax Assets Unamortized Value Of Terminated Forward Starting Interest Rate Swap Tax effect of other comprehensive earnings, Unamortized Value of Terminated Forward Starting Interest Rate Swap Accumulated Other Comprehensive Loss Noncurrent Deferred Tax Assets Other Comprehensive Earnings Tax Effect Unamortized Value Of Terminated Forward Starting Interest Rate Swap Balance at end of period, Unamortized Value of Terminated Forward Starting Interest Rate Swap Accumulated other comprehensive loss noncurrent deferred tax assets other comprehensive earnings tax effect period increase decrease. Accumulated other comprehensive loss noncurrent deferred tax assets net. Balance at beginning of period, Net Noncurrent Deferred Tax Assets Accumulated Other Comprehensive Loss Noncurrent Deferred Tax Assets Net Tax effect of other comprehensive earnings, Net Noncurrent Deferred Tax Assets Accumulated Other Comprehensive Loss Noncurrent Deferred Tax Assets Other Comprehensive Earnings Tax Effect Period Increase Decrease Balance at end of period, Net Noncurrent Deferred Tax Assets Reclassification Out Of Accumulated Other Comprehensive Income [Table] Reclassification Out Of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income Reclassification Out Of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income Reclassification Out Of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income Reclassification Out Of Accumulated Other Comprehensive Income [Member] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Other Nonoperating Income, Net Other Nonoperating Income Expense [Member] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] Prior service credit Other Comprehensive Income Loss Amortization Adjustment From A O C I Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax Actuarial loss Other Comprehensive Income Loss Reclassification Adjustment From A O C I Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax Total reclassifications out of accumulated other comprehensive loss before taxes Other Comprehensive Income Loss Reclassification Adjustment From A O C I Pension And Other Postretirement Benefit Plans Before Tax Additional interest expense Tax benefit Earnings from Continuing Operations Basic and diluted net income loss attributable to common shareholders of reporting entity. Net earnings attributable to Martin Marietta Materials, Inc. Income Loss From Continuing Operations Less: Distributed and undistributed earnings attributable to unvested awards Participating Securities Distributed And Undistributed Earnings Loss Diluted Basic and diluted net earnings available to common shareholders attributable to Martin Marietta Materials, Inc. Basic And Diluted Net Income Loss Attributable To Common Shareholders Of Reporting Entity Basic weighted-average common shares outstanding Effect of dilutive employee and director awards Incremental Common Shares Attributable To Share Based Payment Arrangements Diluted weighted-average common shares outstanding Product and freight revenues customer payment terms. Customer payments term based on contractual billing. Revenue recognition. Revenue recognition. Revenue Recognition [Table] Revenue Recognition [Table] Range Range [Axis] Range Range [Member] Minimum Minimum [Member] Maximum Maximum [Member] Geographical Statement Geographical [Axis] Geographical Segment Geographical [Domain] Colorado COLORADO Revenue Recognition [Line Items] Revenue Recognition [Line Items] Performance obligations, description of timing Revenue Performance Obligation Description Of Timing Performance obligations, customer satisfaction period Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period Product and freight revenues customer payment terms Product And Freight Revenues Customer Payment Terms Customer payments term based on contractual billing Customer Payments Term Based On Contractual Billing Future revenues from unsatisfied performance obligations Revenue Remaining Performance Obligation Consolidation Items Consolidation Items [Axis] Consolidation Items Consolidation Items [Domain] Operating Segments Operating Segments [Member] Segments Statement Business Segments [Axis] Segments Segment [Domain] Mid America Group. Mid-America Group Mid America Group [Member] Southeast group. Southeast Group Southeast Group [Member] West group. West Group West Group [Member] Magnesia specialties. Magnesia Specialties Magnesia Specialties [Member] Products and Services Product Or Service [Axis] Products and Services Products And Services [Domain] Building materials business. Building Materials Business Building Materials Business [Member] Products and Services Freight Total Service revenues Sales Revenue Services Net Costs in excess of billings Costs In Excess Of Billings On Uncompleted Contracts Or Programs Billings in excess of costs Billings In Excess Of Cost Revenue recognized from contract liabilities Contract With Customer Liability Revenue Recognized Retainage on contracts Contract Receivable Retainage Construction contracts warranty provisions period. Construction contracts warranty provisions period Construction Contracts Warranty Provisions Period Finished products Inventory Finished Goods Products in process and raw materials Inventory Work In Process And Raw Materials Supplies and expendable parts Other Inventory Supplies Inventories, Gross Inventory Gross Less: Allowances Inventory Valuation Reserves Total Debt Instrument [Table] Debt Instrument [Table] Debt Instrument Debt Instrument [Axis] Debt Instrument, Name Debt Instrument Name [Domain] Six point six zero percent senior notes due twenty eighteen. 6.60% Senior Notes, Due 2018 Six Point Six Zero Percent Senior Notes Due Twenty Eighteen [Member] Seven percent debentures due twenty twenty five. 7% Debentures, Due 2025 Seven Percent Debentures Due Twenty Twenty Five [Member] Six point two five percent senior notes due twenty thirty seven. 6.25% Senior Notes, Due 2037 Six Point Two Five Percent Senior Notes Due Twenty Thirty Seven [Member] Four point two five percent senior notes due twenty twenty four. 4.25% Senior Notes, Due 2024 Four Point Two Five Percent Senior Notes Due Twenty Twenty Four [Member] Four point two five zero percent senior notes due twenty fourty seven. 4.250% Senior Notes, Due 2047 Four Point Two Five Zero Percent Senior Notes Due Twenty Fourty Seven [Member] Floating rate senior notes due twenty seventeen. Floating Rate Notes, Due 2017 Floating Rate Senior Notes Due Twenty Seventeen [Member] Three point five zero zero percent senior notes due twenty twenty seven. 3.500% Senior Notes, Due 2027 Three Point Five Zero Zero Percent Senior Notes Due Twenty Twenty Seven [Member] Floating rate senior notes due twenty twenty. Floating Rate Notes, Due 2020 Floating Rate Senior Notes Due Twenty Twenty [Member] Three point four five zero percent senior notes due twenty twenty seven. 3.450% Senior Notes, Due 2027 Three Point Four Five Zero Percent Senior Notes Due Twenty Twenty Seven [Member] Floating rate Ssnior notes due twenty nineteen. Floating Rate Notes, Due 2019 Floating Rate Senior Notes Due Twenty Nineteen [Member] Trade receivable credit facility. Trade Receivable Facility Trade Receivable Credit Facility [Member] Other notes. Other Notes Other Notes [Member] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] Revolving facility due twenty twenty two. Revolving Facility, Due 2022 Revolving Facility Due Twenty Twenty Two [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Total debt Long Term Debt Less: Current maturities of long-term debt and short-term facilities Debt instrument maturity date year. Maturity year Debt Instrument Maturity Date Year Interest rate on notes Debt Instrument Interest Rate Stated Percentage Interest rate Debt Instrument Interest Rate Effective Percentage Credit Facility interest rate Line Of Credit Facility Interest Rate At Period End Line of credit facility borrowing base. Variable Rate Variable Rate [Axis] Variable Rate Variable Rate [Domain] London Interbank Offered Rate(LIBOR) London Interbank Offered Rate L I B O R [Member] Revolving Facility Revolving Credit Facility [Member] Long-term Debt, Type Longterm Debt Type [Axis] Long-term Debt, Type Longterm Debt Type [Domain] Including acquisition bridge debt. Including Acquisition Bridge Debt Including Acquisition Bridge Debt [Member] Excluding acquisition bridge debt. Excluding Acquisition Bridge Debt Excluding Acquisition Bridge Debt [Member] Maximum Credit facility commitment Line Of Credit Facility Maximum Borrowing Capacity Debt instrument maturity period Line Of Credit Facility Expiration Date1 Basis spread on variable rate Debt Instrument Basis Spread On Variable Rate1 Credit facility borrowing base Line Of Credit Facility Borrowing Base Maximum consolidated debt reduction for unrestricted cash and cash equivalents for debt covenant calculation. The amount by which consolidated debt, for purposes of calculating the debt covenant ratio, may be reduced for unrestricted cash and cash equivalents, provided no amounts are outstanding under the revolving credit facility and the AR credit facility. Ratio of consolidated debt to earnings before interest taxes depreciation and amortization. Senior unsecured revolving facility, maturity period Line Of Credit Facility Expiration Period Debt covenant Ratio Of Consolidated Debt To Earnings Before Interest Taxes Depreciation And Amortization Maximum consolidated debt reduction for unrestricted cash and cash equivalents for debt covenant calculation Maximum Consolidated Debt Reduction For Unrestricted Cash And Cash Equivalents For Debt Covenant Calculation Reduction of consolidated debt in the debt ratio calculation Consolidated Debt Reduction For Unrestricted Cash And Cash Equivalents For Debt Covenant Calculation Outstanding letters of credit Letters Of Credit Outstanding Amount Additional interest expense Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net Fair Value Disclosures [Abstract] Long-term debt, carrying values Long-term debt, fair values Long Term Debt Fair Value Favorable basis points on tax rate related to vesting and exercise of stock-based compensation awards. Tax Cuts and Jobs Act of 2017 incomplete accounting, transition tax for accumulated foreign earnings, provisional income tax expense. Tax Cuts and Jobs Act of 2017 incomplete accounting, transition tax for accumulated foreign earnings, provisional income tax expense percent. Favorable basis points on tax rate related to vesting and exercise of stock-based compensation awards amount. Effective income tax rate Effective Income Tax Rate Continuing Operations Favorable basis points on tax rate related to vesting and exercise of stock-based compensation awards, amount Favorable Basis Points On Tax Rate Related To Vesting And Exercise Of Stock Based Compensation Awards Amount Favorable basis points on tax rate related to vesting and exercise of stock-based compensation awards Favorable Basis Points On Tax Rate Related To Vesting And Exercise Of Stock Based Compensation Awards Provision of Tax Cuts and Jobs Act, transition tax on undistributed foreign earnings, unfavorable impact, amount Tax Cuts And Jobs Act Of2017 Incomplete Accounting Transition Tax For Accumulated Foreign Earnings Provisional Income Tax Expense Provision of Tax Cuts and Jobs Act, transition tax on undistributed foreign earnings, unfavorable impact basis point on tax rate Tax Cuts And Jobs Act Of2017 Incomplete Accounting Transition Tax For Accumulated Foreign Earnings Provisional Income Tax Expense Percent Federal statutory corporate income tax rate Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate Schedule Of Defined Benefit Plans Disclosures [Table] Schedule Of Defined Benefit Plans Disclosures [Table] Pension Retirement Plan Type [Axis] Retirement Plan Type Retirement Plan Type [Domain] Pension Pension Plans Defined Benefit [Member] Postretirement Benefits Other Postretirement Benefit Plans Defined Benefit [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Service cost Defined Benefit Plan Service Cost Interest cost Defined Benefit Plan Interest Cost Expected return on assets Defined Benefit Plan Expected Return On Plan Assets Prior service cost (credit) Defined Benefit Plan Amortization Of Prior Service Cost Credit Actuarial loss (gain) Defined Benefit Plan Amortization Of Gains Losses Net periodic benefit cost (credit) Defined Benefit Plan Net Periodic Benefit Cost Affiliate line of credit facility maturity period. Commitments and contingencies. Commitments and contingencies. Commitments And Contingencies [Table] Commitments And Contingencies [Table] Guarantor Obligations, Nature Guarantee Obligations By Nature [Axis] Guarantor Obligations, Nature Guarantee Obligations Nature [Domain] Revolving line of credit expires in august two thousand fifteen. Revolving Line Of Credit Expires In August 2015 Revolving Line Of Credit Expires In August Two Thousand Fifteen [Member] Interest-only loan. Interest-only loan Interest Only Loan [Member] Commitments and Contingencies [Line Items] Commitments And Contingencies [Line Items] Guarantee of affiliate's obligations Guarantee Obligations Maximum Exposure Line of credit maturity date Affiliate Line Of Credit Facility Maturity Period Due from affiliate Due From Affiliates Due date Debt Instrument Maturity Date Reportable business segments Schedule Of Segment Reporting Information By Segment [Table] Schedule Of Segment Reporting Information By Segment [Table] Corporate Corporate Non Segment [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Total revenues Earnings (Loss) from operations Schedule Of Product Information [Table] Schedule Of Product Information [Table] Aggregates. Aggregates Aggregates [Member] Cement. Cement Cement [Member] Ready mixed concrete. Ready Mixed Concrete Ready Mixed Concrete [Member] Asphalt and paving. Asphalt and Paving Asphalt And Paving [Member] Subsegments Consolidation Items Subsegments Consolidation Items [Axis] Subsegments Consolidation Items Subsegments Consolidation Items [Domain] Reportable Subsegments Reportable Subsegments [Member] Interproduct Revenues Intersubsegment Eliminations [Member] Subsegments Subsegments [Axis] Subsegments Subsegments [Domain] Products and services. Products and Services Products And Services [Member] Freight. Freight Freight [Member] Product Information [Line Items] Product Information [Line Items] Gross profit (loss) Increase decrease in accrued salaries benefits and payroll taxes. Increase decrease in accrued insurance and other taxes. Other current and noncurrent assets Increase Decrease In Other Operating Assets Accrued salaries, benefits and payroll taxes Increase Decrease In Accrued Salaries Benefits And Payroll Taxes Accrued insurance and other taxes Increase Decrease In Accrued Insurance And Other Taxes Accrued income taxes Increase Decrease In Accrued Income Taxes Payable Accrued pension, postretirement and postemployment benefits Increase Decrease In Pension And Postretirement Obligations Other current and noncurrent liabilities Increase Decrease In Other Operating Liabilities Change in other assets and liabilities, net Accrued liabilities for purchases of property, plant and equipment Capital Expenditures Incurred But Not Yet Paid Acquisition of assets through capital lease Noncash Or Part Noncash Acquisition Other Assets Acquired1 Cash paid for interest Interest Paid Cash (refund of) paid for income taxes Income Taxes Paid Net Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Business Acquisition Business Acquisition [Axis] Business Acquisition, Acquiree Business Acquisition Acquiree [Domain] Bluegrass Materials Company. Bluegrass Materials Company Bluegrass Materials Company [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Repayments of credit facility Repayments Of Lines Of Credit Maturity date Business acquisition in cash Payments To Acquire Businesses Gross Company acquired voting interest Business Acquisition Percentage Of Voting Interests Acquired