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 Receivable Net Current Inventories, net Inventory Net Assets held for sale Assets Held For Sale Not Part Of Disposal Group Current 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] Bank overdraft Bank Overdrafts 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 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 Income Statement [Abstract] Net Sales Sales Revenue Goods Net Freight and delivery revenues Shipping And Handling Revenue Total revenues Sales Revenue Net Cost of sales Cost Of Goods Sold Freight and delivery costs 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, net Business Combination Acquisition Related Costs Other operating (income) and expenses, net Other Operating Income Expense Net Earnings from Operations Operating Income Loss Interest expense Interest Expense Other nonoperating (income) and expenses, net Other Nonoperating Income Expense Earnings before taxes on income Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Taxes on income Income Tax Expense Benefit Consolidated net earnings Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest Less: Net earnings 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 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 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 on divestitures and sales of assets Gain Loss On Disposition Of Assets Deferred income taxes Deferred Income Tax Expense Benefit Excess tax benefits from stock-based compensation transactions Excess Tax Benefit From Share Based Compensation Operating Activities 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 Acquisitions, net Payments To Acquire Businesses Net Of Cash Acquired Cash received in acquisition Cash Acquired From Acquisition Proceeds from divestitures and sales of assets Proceeds From Sales Of Business Affiliate And Productive Assets Repayments from affiliate Proceeds From Collection Of Advance To Affiliate Payment of railcar construction advances Repayments Of Advances For Construction Reimbursement of railcar construction advances Proceeds From Advances For Construction 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 Change in bank overdraft Proceeds From Repayments Of Bank Overdrafts Dividends paid Payments Of Dividends Common Stock Issuances of common stock Proceeds From Issuance Of Common Stock Repurchases of common stock Payments For Repurchase Of Common Stock Excess tax benefits from stock-based compensation transactions Excess Tax Benefit From Share Based Compensation Financing Activities Net Cash Used for Financing Activities Net Cash Provided By Used In Financing Activities Net Decrease 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 Supplemental Disclosures of Cash Flow Information: Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid Cash paid for income taxes Income Taxes Paid Net 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 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 Treasury Stock Value Acquired Cost Method Repurchases of common stock, Shares Treasury Stock Shares Acquired Stock-based compensation expense Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Ending Balance Ending Balance (in shares) Accounting Policies [Abstract] Significant Accounting Policies Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [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] Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Information Cash Flow Supplemental Disclosures [Text Block] Business Combinations [Abstract] Business Combination Business Combination Disclosure [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Stock-Based Compensation Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Organization policy. Organization Organization Policy [Text Block] Basis of Presentation Basis Of Accounting Policy Policy [Text Block] Debt Issuance Cost, Revenue Recognition Standard, Lease Standard and Share-based Payment Standard New Accounting Pronouncements Policy Policy [Text Block] Consolidated Comprehensive Earnings/Loss and Accumulated Other Comprehensive Loss Comprehensive Income Policy Policy [Text Block] Earnings (Loss) 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 (Loss) Earnings, 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 (Loss) per Common Share Schedule Of Earnings Per Share Basic And Diluted 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 Schedule Of Net Benefit Costs Table [Text Block] Financial Data for Continuing Operation For Corporation's Reportable Business Segments Schedule Of Segment Reporting Information By Segment [Text Block] Net Sales 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 noncash investing and financing activities. Schedule Of Noncash Investing and Financing Activities Schedule Of Noncash Investing And Financing Activities Table [Text Block] Number of quarries distribution facilities and plants. Number of states with aggregates business sales by destination. Products and Services Product Or Service [Axis] Products and Services Products And Services [Domain] Aggregates product line. Aggregates Product Line Aggregates Product Line [Member] Aggregates-related downstream product lines. Aggregates-Related Downstream Product Lines Aggregates Related Downstream Product Lines [Member] Concentration Risk Type Concentration Risk By Type [Axis] Concentration Risk Type Concentration Risk Type [Domain] Product Concentration Risk Product Concentration Risk [Member] Concentration Risk Benchmark Concentration Risk By Benchmark [Axis] Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Product Line Sales Sales Revenue Product Line [Member] Segments Statement Business Segments [Axis] Segments Segment [Domain] Cement. Cement Cement [Member] Sales Revenue Segment Sales Revenue Segment [Member] Magnesia specialties. Magnesia Specialties Magnesia Specialties [Member] Scenario Statement Scenario [Axis] Scenario, Unspecified Scenario Unspecified [Domain] Restatement Adjustment Restatement Adjustment [Member] Balance Sheet Location Balance Sheet Location [Axis] Balance Sheet Location Balance Sheet Location [Domain] Other Noncurrent Assets Other Noncurrent Assets [Member] Other Current Assets Other Current Assets [Member] Total net sales, percentage Concentration Risk Percentage1 Number of quarries distribution facilities and plants Number Of Quarries Distribution Facilities And Plants 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 Debt issuance cost Unamortized Debt Issuance Expense Statement Of Income And Comprehensive Income [Abstract] Net earnings attributable to Martin Marietta Materials, Inc. Other comprehensive loss, net of tax Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Net earnings attributable to noncontrolling interests Other comprehensive earnings, net of tax Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest Comprehensive earnings 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] Balance at beginning of period Other comprehensive (loss) earnings 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 (loss) earnings, net of tax Balance at end of period Other comprehensive loss before reclassifications for pension and postretirement benefit plans, tax benefit Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax Accumulated other comprehensive loss, noncurrent deferred tax assets, pension and postretirement benefit plans. Accumulated other comprehensive loss, noncurrent deferred tax assets, other comprehensive earnings, tax effect, 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 Other comprehensive earnings, tax effect, 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, 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 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 Other comprehensive earnings, tax effect, 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 net. Accumulated other comprehensive loss noncurrent deferred tax assets other comprehensive earnings tax effect period increase decrease. Balance at beginning of period, Net Non current Deferred Tax Assets Accumulated Other Comprehensive Loss Noncurrent Deferred Tax Assets Net Other comprehensive earnings, tax effect, Net Non current 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 Non current 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] Cost of sale; Selling, General & Administrative Expenses Selling General And Administrative Expenses [Member] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] Settlement charge Other Comprehensive Income Loss Reclassification Adjustment From A O C I Pension And Other Postretirement Benefit Plans For Net Transition Asset Obligation Before Tax 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 Income tax benefit Reclassification From Aoci Current Period Tax Earnings from Continuing Operations Basic and diluted net income loss attributable to common shareholders of reporting entity. Net earnings from continuing operations 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 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 percent senior notes due twenty eighteen. 6.6% Senior Notes, Due 2018 Six Point Six 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] Floating rate senior notes due twenty seventeen. Floating Rate Notes, Due 2017 Floating Rate Senior Notes Due Twenty Seventeen [Member] Term loan facility due twenty eighteen. Term Loan Facility, Due 2018 Term Loan Facility Due Twenty Eighteen [Member] Trade receivable credit facility. Trade Receivable Facility Trade Receivable Credit Facility [Member] Other notes. Other Notes Other Notes [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Total debt Long Term Debt Less: Current maturities Long Term Debt Current 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] Term loan facility. Term Loan Facility Term Loan Facility [Member] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] 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] Range Range [Axis] Range Range [Member] Maximum Maximum [Member] Minimum Minimum [Member] Business Acquisition Business Acquisition [Axis] Business Acquisition, Acquiree Business Acquisition Acquiree [Domain] Texas Industries Inc. [Member] Texas Industries Inc. Texas Industries Inc [Member] 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 Ratio of consolidated debt to earnings before interest taxes depreciation depletion and amortization. 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. Senior unsecured revolving facility, maturity period Line Of Credit Facility Expiration Period Debt covenant Ratio Of Consolidated Debt To Earnings Before Interest Taxes Depreciation Depletion 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 Acquisition integration expenses Business Combination Integration Related Costs Outstanding letters of credit Letters Of Credit Outstanding Amount Maturity date Debt Instrument Maturity Date Increase in annual interest expense due to ongoing amortization of the terminated value of the Swap agreements. Additional interest expense Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net Increase in annual interest expense due to ongoing amortization of the terminated value of the swap agreements Increase In Annual Interest Expense Due To Ongoing Amortization Of Terminated Value Of Swap Agreements Fair Value Disclosures [Abstract] Long-term debt, carrying values Long-term debt, fair values Long Term Debt Fair Value Effective income tax rate Effective Income Tax Rate Continuing Operations Schedule Of Defined Benefit Plans Disclosures [Table] Schedule Of Defined Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Defined Benefit Plans Disclosures Defined Benefit Plans [Axis] Defined Benefit Plan and Other Postretirement Benefit Plan Defined Benefit Plans [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 Settlement charge Defined Benefit Plan Recognized Net Gain Loss Due To Settlements1 Special termination benefit Defined Benefit Plan Recognized Net Gain Loss Due To Curtailments Net periodic benefit cost (credit) Defined Benefit Plan Net Periodic Benefit Cost SERP Plans Supplemental Employee Retirement Plan Defined Benefit [Member] Estimated contribution of pension plans Defined Benefit Plans Estimated Future Employer Contributions In Current Fiscal Year Commitments and contingencies. Commitments and contingencies. Commitments And Contingencies [Table] Commitments And Contingencies [Table] Subsegments Subsegments [Axis] Subsegments Subsegments [Domain] Woodville. Woodville Woodville [Member] Commitments and Contingencies [Line Items] Commitments And Contingencies [Line Items] Guarantee of affiliate's obligations Guarantee Obligations Maximum Exposure Due from affiliate Due From Affiliates Percentage of employees represented in labor union. Collective Bargaining Agreement Expiration Month Year. Percentage of employees represented in labor union Percentage Of Employees Represented In Labor Union Collective bargaining agreement expiration month year Collective Bargaining Agreement Expiration Month Year Schedule Of Segment Reporting Information By Segment [Table] Schedule Of Segment Reporting Information By Segment [Table] Consolidation Items Consolidation Items [Axis] Consolidation Items Consolidation Items [Domain] Operating Segments Operating Segments [Member] Geographical Statement Geographical [Axis] Geographical Segment Geographical [Domain] California CALIFORNIA Intersegment Eliminations Intersegment Elimination [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Reportable business segments Corporate Corporate Non Segment [Member] Mid America Group. Mid-America Group Mid America Group [Member] Southeast group. Southeast Group Southeast Group [Member] West group. West Group West Group [Member] Aggregates business. Aggregates Business Aggregates Business [Member] Total revenues Earnings (Loss) from Operations Schedule Of Product Information [Table] Schedule Of Product Information [Table] Aggregates. Aggregates Aggregates [Member] Asphalt and paving. Asphalt and Paving Asphalt And Paving [Member] Ready mixed concrete. Ready Mixed Concrete Ready Mixed Concrete [Member] Product Information [Line Items] Product Information [Line Items] Gross profit (loss), Total 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 Acquisition of assets through capital lease Noncash Or Part Noncash Acquisition Other Assets Acquired1 Acquisition of assets through asset exchange Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 Business combination acquired mineral reserves. Business combinations. Schedule of business combinations and dispositions table. Schedule Of Business Combinations And Dispositions [Table] Schedule Of Business Combinations And Dispositions [Table] Colorado COLORADO Business Combinations [Line Items] Business Combinations [Line Items] Acquisition of mineral reserves Business Combination Acquired Mineral Reserves Share based compensation arrangement by share based payment award options expected to be awarded number. Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Award Type Award Type [Axis] Equity Award Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Performance Stock Units Performance Shares [Member] Restricted Stock Units Restricted Stock Units R S U [Member] Stock Options Employee Stock Option [Member] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Number of awards, granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted average grant-date fair value of stock awards, granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value Stock options expected to be awarded Share Based Compensation Arrangement By Share Based Payment Award Options Expected To Be Awarded Number