$MLM
MARTIN MARIETTA MATERIALS INC Stock $mlm

$mlm Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000156459020005784 Filed on February 21, 2020

Income Statement

Concept	2019 Q4	2019	2018 Q4
Revenue	$1.100B	$4.739B	$1.020B
YoY Change	7.86%	11.66%	5.12%
Cost Of Revenue	$841.9M	$3.560B	$792.9M
YoY Change	6.18%	8.62%	11.46%
Gross Profit	$258.6M	$1.179B	$227.3M
YoY Change	13.77%	21.97%	-12.27%
Gross Profit Margin	23.5%	24.88%	22.28%
Selling, General & Admin	$73.70M	$302.7M	$70.90M
YoY Change	3.95%	7.88%	5.82%
% of Gross Profit	28.5%	25.67%	31.19%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$94.50M	$371.5M	$90.80M
YoY Change	4.07%	7.99%	19.79%
% of Gross Profit	36.54%	31.51%	39.95%
Operating Expenses	$73.70M	$302.7M	$79.70M
YoY Change	-7.53%	7.88%	13.21%
Operating Profit	$184.9M	$884.9M	$147.6M
YoY Change	25.27%	28.12%	-21.78%
Interest Expense	-$30.60M	$129.3M	-$33.50M
YoY Change	-8.66%	-5.69%	42.55%
% of Operating Profit	-16.55%	14.61%	-22.7%
Other Income/Expense, Net	$2.400M	-$7.300M	$2.500M
YoY Change	-4.0%	-132.44%	-30.56%
Pretax Income	$156.3M	$748.3M	$116.0M
YoY Change	34.74%	29.89%	-29.1%
Income Tax	$25.20M	$136.3M	$21.60M
% Of Pretax Income	16.12%	18.21%	18.62%
Net Earnings	$131.0M	$611.9M	$94.40M
YoY Change	38.77%	30.19%	-74.97%
Net Earnings / Revenue	11.9%	12.91%	9.25%
Basic Earnings Per Share		$9.77
Diluted Earnings Per Share	$2.093M	$9.74	$1.501M
COMMON SHARES
Basic Shares Outstanding	62.50M	62.50M	62.71M
Diluted Shares Outstanding		62.70M

Balance Sheet

Concept	2019 Q4	2019	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$21.00M	$21.00M	$45.00M
YoY Change	-53.33%	-53.33%	-96.89%
Cash & Equivalents	$21.00M	$21.00M	$44.90M
Short-Term Investments
Other Short-Term Assets	$141.2M	$141.0M	$134.6M
YoY Change	4.89%	4.44%	38.83%
Inventory	$690.8M	$691.0M	$663.0M
Prepaid Expenses
Receivables	$573.7M	$560.0M	$523.3M
Other Receivables	$0.00	$14.00M	$0.00
Total Short-Term Assets	$1.427B	$1.427B	$1.366B
YoY Change	4.46%	4.47%	-48.09%
LONG-TERM ASSETS
Property, Plant & Equipment	$5.206B	$5.688B	$5.157B
YoY Change	0.95%	10.3%	43.54%
Goodwill	$2.397B		$2.399B
YoY Change	-0.1%		11.05%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$133.4M	$133.0M	$128.0M
YoY Change	4.22%	3.91%	25.61%
Total Long-Term Assets	$8.705B	$8.705B	$8.186B
YoY Change	6.34%	6.35%	28.68%
TOTAL ASSETS
Total Short-Term Assets	$1.427B	$1.427B	$1.366B
Total Long-Term Assets	$8.705B	$8.705B	$8.186B
Total Assets	$10.13B	$10.13B	$9.551B
YoY Change	6.07%	6.08%	6.22%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$229.6M	$230.0M	$210.8M
YoY Change	8.92%	9.0%	14.79%
Accrued Expenses	$173.0M	$173.0M	$125.0M
YoY Change	38.4%	38.4%	1.63%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$340.0M	$343.0M	$390.0M
YoY Change	-12.82%	-12.05%	30.04%
Total Short-Term Liabilities	$838.5M	$839.0M	$786.7M
YoY Change	6.58%	6.61%	13.32%
LONG-TERM LIABILITIES
Long-Term Debt	$2.434B	$2.440B	$2.730B
YoY Change	-10.87%	-10.62%	0.11%
Other Long-Term Liabilities	$339.3M	$767.0M	$379.3M
YoY Change	-10.55%	102.37%	62.26%
Total Long-Term Liabilities	$2.773B	$3.207B	$3.110B
YoY Change	-10.83%	3.15%	5.02%
TOTAL LIABILITIES
Total Short-Term Liabilities	$838.5M	$839.0M	$786.7M
Total Long-Term Liabilities	$2.773B	$3.207B	$3.110B
Total Liabilities	$4.778B	$4.781B	$4.602B
YoY Change	3.83%	3.82%	6.77%
SHAREHOLDERS EQUITY
Retained Earnings	$2.077B		$1.693B
YoY Change	22.67%		17.58%
Common Stock	$3.419B		$3.397B
YoY Change	0.67%		0.83%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$5.351B	$5.351B	$4.946B
YoY Change
Total Liabilities & Shareholders Equity	$10.13B	$10.13B	$9.551B
YoY Change	6.07%	6.08%	6.22%

Cashflow Statement

Concept	2019 Q4	2019	2018 Q4
OPERATING ACTIVITIES
Net Income	$131.0M	$611.9M	$94.40M
YoY Change	38.77%	30.19%	-74.97%
Depreciation, Depletion And Amortization	$94.50M	$371.5M	$90.80M
YoY Change	4.07%	7.99%	19.79%
Cash From Operating Activities	$316.3M	$966.1M	$263.6M
YoY Change	19.99%	37.02%	9.92%
INVESTING ACTIVITIES
Capital Expenditures	-$110.5M	$393.5M	-$113.8M
YoY Change	-2.9%	4.65%	12.01%
Acquisitions
YoY Change
Other Investing Activities	$1.300M	$1.400M	$4.200M
YoY Change	-69.05%	-100.09%	-1150.0%
Cash From Investing Activities	-$109.2M	-$385.9M	-$109.6M
YoY Change	-0.36%	-80.19%	7.56%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$98.20M
YoY Change		-2.19%
Debt Paid & Issued, Net		$975.1M
YoY Change		7.14%
Cash From Financing Activities	-235.2M	-604.1M	-163.1M
YoY Change	44.21%	281.38%	-112.81%
NET CHANGE
Cash From Operating Activities	316.3M	966.1M	263.6M
Cash From Investing Activities	-109.2M	-385.9M	-109.6M
Cash From Financing Activities	-235.2M	-604.1M	-163.1M
Net Change In Cash	-28.10M	-23.90M	-9.100M
YoY Change	208.79%	-98.29%	-100.64%
FREE CASH FLOW
Cash From Operating Activities	$316.3M	$966.1M	$263.6M
Capital Expenditures	-$110.5M	$393.5M	-$113.8M
Free Cash Flow	$426.8M	$572.6M	$377.4M
YoY Change	13.09%	73.99%	10.54%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
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CY2019	dei	Local Phone Number LocalPhoneNumber	781-4550
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	City Area Code CityAreaCode	919
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CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Trading Symbol TradingSymbol	MLM
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0000916076
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CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
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CY2019	dei	Entity File Number EntityFileNumber	1-12744
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CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	9551400000
CY2019	us-gaap	Profit Loss ProfitLoss	612000000.0
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	29300000
CY2018	us-gaap	Profit Loss ProfitLoss	470400000
CY2017	us-gaap	Profit Loss ProfitLoss	713400000
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	371500000
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	344000000.0
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	34100000
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	3100000
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	14200000
CY2018	mlm	Noncash Portion Of Asset And Portfolio Rationalization Charge NoncashPortionOfAssetAndPortfolioRationalizationCharge	17000000.0
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-14600000
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	705100000
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	657600000
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	393500000
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	376000000.0
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	410300000
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1642100000
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	12100000
CY2019	us-gaap	Proceeds From Sales Of Business Affiliate And Productive Assets ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets	8400000
CY2018	us-gaap	Proceeds From Sales Of Business Affiliate And Productive Assets ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets	69100000
CY2017	us-gaap	Proceeds From Sales Of Business Affiliate And Productive Assets ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets	36000000.0
CY2018	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	79400000
CY2017	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	43600000
CY2018	us-gaap	Proceeds From Advances For Construction ProceedsFromAdvancesForConstruction	79400000
CY2017	us-gaap	Proceeds From Advances For Construction ProceedsFromAdvancesForConstruction	43600000
CY2019	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	600000
CY2018	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	800000
CY2017	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	300000
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1400000
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-385900000
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1948200000
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-386100000
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	625000000.0
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1000000000.0
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2408800000
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	975100000
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	910100000
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1065000000.0
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	3900000
CY2017	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	2200000
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	11000000.0
CY2018	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	3500000
CY2017	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	3500000
CY2017	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	200000
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	13700000
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	7300000
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	28100000
CY2017	mlm	Payments Of Deferred Acquisition Consideration PaymentsOfDeferredAcquisitionConsideration	2800000
CY2018	mlm	Payments To Acquire Noncontrolling Interest In Existing Joint Venture PaymentsToAcquireNoncontrollingInterestInExistingJointVenture	12800000
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	600000
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	116400000
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	108900000
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	100400000
CY2018	mlm	Payments Of Deferred Acquisition Consideration PaymentsOfDeferredAcquisitionConsideration	6700000
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-604100000
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-23900000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	44900000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	21000000.0
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4142600000
CY2017	us-gaap	Profit Loss ProfitLoss	713400000
CY2017	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	11800000
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	30500000
CY2017	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	200000
CY2018	us-gaap	Profit Loss ProfitLoss	470400000
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-14500000
CY2018	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	11900000
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	100400000
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	29300000
CY2018	us-gaap	Noncontrolling Interest Increase From Business Combination NoncontrollingInterestIncreaseFromBusinessCombination	9000000.0
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-2200000
CY2018	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	12800000
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4949400000
CY2019	us-gaap	Profit Loss ProfitLoss	612000000.0
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	16700000
CY2019	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	28100000
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	34100000
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5353300000
CY2019Q4	mlm	Number Of States With Aggregates Business Sales By Destination NumberOfStatesWithAggregatesBusinessSalesByDestination	27
CY2019	mlm	Number Of Cement Plants NumberOfCementPlants	2
CY2019	mlm	Number Of Asphalt Plants NumberOfAsphaltPlants	7
CY2019	mlm	Out Of Period Expense OutOfPeriodExpense	15700000
CY2018Q4	mlm	Deferred Tax Assets Valuation And Other Reserves DeferredTaxAssetsValuationAndOtherReserves	22400000
CY2019	mlm	Retirement Plans And Postretirement Benefits Amortized Amount Representing Percentage Of Greater Of Projected Benefit Obligation Or Pension Plan Assets RetirementPlansAndPostretirementBenefitsAmortizedAmountRepresentingPercentageOfGreaterOfProjectedBenefitObligationOrPensionPlanAssets	0.10
CY2019	mlm	Minimum Likelihood For Recognition Of Tax Benefit Related To Uncertain Tax Position MinimumLikelihoodForRecognitionOfTaxBenefitRelatedToUncertainTaxPosition	0.50
CY2019	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-11100000
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2200000
CY2019Q4	us-gaap	Deferred Tax Assets Other Comprehensive Loss DeferredTaxAssetsOtherComprehensiveLoss	85200000
CY2018	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-25000000.0
CY2018	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-10500000
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-14500000
CY2018Q4	us-gaap	Deferred Tax Assets Other Comprehensive Loss DeferredTaxAssetsOtherComprehensiveLoss	84200000
CY2017	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-6900000
CY2017	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-8500000
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1600000
CY2017Q4	us-gaap	Deferred Tax Assets Other Comprehensive Loss DeferredTaxAssetsOtherComprehensiveLoss	80100000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	611900000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	470000000.0
CY2017	us-gaap	Net Income Loss NetIncomeLoss	713300000
CY2018	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Diluted ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted	800000
CY2017	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Diluted ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted	2000000.0
CY2019	mlm	Basic And Diluted Net Income Loss Attributable To Common Shareholders Of Reporting Entity BasicAndDilutedNetIncomeLossAttributableToCommonShareholdersOfReportingEntity	611000000.0
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	62500000
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	62900000
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	62900000
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	200000
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	300000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	62700000
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	63100000
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	63200000
CY2019	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<p style="text-align:justify;margin-bottom:0pt;margin-top:0pt;text-indent:0%;font-weight:bold;font-style:italic;color:#4EAD8A;font-family:Calibri;font-size:10pt;text-transform:none;font-variant: normal;">Reclassifications.<span style="font-family:Times New Roman;font-weight:normal;color:#000000;"> </span><span style="font-weight:normal;font-style:normal;color:#000000;">Certain reclassifications were made to the comparative years’ financial statements and notes to the financial statements to conform to the December 31, 2019 presentation. Such reclassifications had no impact on the Company’s previously reported results of operations, financial position or cash flows.</span></p>
CY2019	us-gaap	Revenue Performance Obligation Description Of Timing RevenuePerformanceObligationDescriptionOfTiming	Performance obligations within paving service agreements are satisfied over time, primarily ranging from one day to two years. For product revenues and freight revenues, customer payment terms are generally 30 days from invoice date. Customer payments for the paving operations are based on a contractual billing schedule and are due 30 days from invoice date.
CY2019	mlm	Product And Freight Revenues Customer Payment Terms ProductAndFreightRevenuesCustomerPaymentTerms	P30D
CY2019	mlm	Customer Payment Terms Based On Contractual Billing CustomerPaymentTermsBasedOnContractualBilling	P30D
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	136100000
CY2018Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	78100000
CY2017Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	67000000.0
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4739100000
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4244300000
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3965600000
CY2019Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	2800000
CY2018Q4	us-gaap	Contract Receivable Retainage ContractReceivableRetainage	7500000
CY2018Q4	us-gaap	Goodwill Goodwill	2399100000
CY2019	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	-1600000
CY2019	mlm	Goodwill Allocated To Assets Held For Sale GoodwillAllocatedToAssetsHeldForSale	-200000
CY2019Q4	us-gaap	Goodwill Goodwill	2396800000
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	245300000
CY2018	mlm	Goodwill Allocated To Assets Held For Sale GoodwillAllocatedToAssetsHeldForSale	-5600000
CY2018	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	900000
CY2018Q4	us-gaap	Goodwill Goodwill	2399100000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	560400000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	101900000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	458500000
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	560400000
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	88800000
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	471600000
CY2019Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	28300000
CY2018Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	29700000
CY2019	mlm	Finite Lived And Indefinite Lived Intangible Assets Acquired FiniteLivedAndIndefiniteLivedIntangibleAssetsAcquired	1500000
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13000000.0
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13900000
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	14200000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	13200000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	12500000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	11100000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	10600000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	10600000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	400500000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	458500000
CY2018Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	2500000
CY2019Q4	us-gaap	Accounts And Other Receivables Net Current AccountsAndOtherReceivablesNetCurrent	573700000
CY2018Q4	us-gaap	Accounts And Other Receivables Net Current AccountsAndOtherReceivablesNetCurrent	523300000
CY2019Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	2900000
CY2019Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	564400000
CY2018Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	514100000
CY2019Q4	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	14000000.0
CY2018Q4	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	12500000
CY2019Q4	mlm	Accounts And Other Receivables Gross Current AccountsAndOtherReceivablesGrossCurrent	578400000
CY2018Q4	mlm	Accounts And Other Receivables Gross Current AccountsAndOtherReceivablesGrossCurrent	526600000
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	4700000
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3300000
CY2018Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	4357700000
CY2019Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	258400000
CY2018Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	178700000
CY2019Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	643600000
CY2018Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	615700000
CY2019Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	41900000
CY2018Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	35600000
CY2019Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	32400000
CY2018Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	31300000
CY2019Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	141500000
CY2018Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	139600000
CY2019Q4	us-gaap	Inventory Gross InventoryGross	859400000
CY2018Q4	us-gaap	Inventory Gross InventoryGross	822200000
CY2019Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	168600000
CY2018Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	159200000
CY2019Q4	us-gaap	Inventory Net InventoryNet	690800000
CY2018Q4	us-gaap	Inventory Net InventoryNet	663000000.0
CY2019Q4	mlm	Land And Land Improvements Gross LandAndLandImprovementsGross	1135000000.0
CY2018Q4	mlm	Land And Land Improvements Gross LandAndLandImprovementsGross	1089600000
CY2019Q4	us-gaap	Mineral Properties Gross MineralPropertiesGross	2509800000
CY2018Q4	us-gaap	Mineral Properties Gross MineralPropertiesGross	2506800000
CY2019Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	163400000
CY2018Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	162100000
CY2019Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	4548600000
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	18300000
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	8633500000
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	8294900000
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	3427500000
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	3137700000
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5206000000.0
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5157200000
CY2019	mlm	Depreciation And Depletion And Amortization Excluding Portion Attributable To Machinery And Equipment Under Capital Leases DepreciationAndDepletionAndAmortizationExcludingPortionAttributableToMachineryAndEquipmentUnderCapitalLeases	354400000
CY2018	mlm	Depreciation And Depletion And Amortization Excluding Portion Attributable To Machinery And Equipment Under Capital Leases DepreciationAndDepletionAndAmortizationExcludingPortionAttributableToMachineryAndEquipmentUnderCapitalLeases	326100000
CY2017	mlm	Depreciation And Depletion And Amortization Excluding Portion Attributable To Machinery And Equipment Under Capital Leases DepreciationAndDepletionAndAmortizationExcludingPortionAttributableToMachineryAndEquipmentUnderCapitalLeases	279800000
CY2019	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	5100000
CY2018	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	3000000.0
CY2017	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	3600000
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	2773600000
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	3120400000
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	340000000.0
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	390000000.0
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2433600000
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2730400000
CY2019	us-gaap	Debt Instrument Redemption Price Percentage DebtInstrumentRedemptionPricePercentage	1.01
CY2019	mlm	Maximum Consolidated Debt Reduction For Unrestricted Cash And Cash Equivalents For Debt Covenant Calculation MaximumConsolidatedDebtReductionForUnrestrictedCashAndCashEquivalentsForDebtCovenantCalculation	200000000.0
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	340000000.0
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	100000
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	100000
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	696700000
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	1736700000
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	2773600000
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	2770000000
CY2019Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	2940000000
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	3120000000
CY2018Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	3010000000.00
CY2017	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	1700000
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	83900000
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	15300000
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	129200000
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	31100000
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	69600000
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-239300000
CY2019	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	115000000.0
CY2018	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	84900000
CY2017	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	-110100000
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	20500000
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	6000000.0
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	14800000
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1500000
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	14100000
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-900000
CY2019	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	19000000.0
CY2018	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	20100000
CY2017	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	13900000
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	2800000
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	-1400000
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1200000
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-500000
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	2100000
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	500000
CY2019	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	2300000
CY2018	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	700000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	136300000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	105700000
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-94500000
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2017	mlm	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Change In Tax Rate Deferred Tax Liability Provisional Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateDeferredTaxLiabilityProvisionalIncomeTaxExpenseBenefit	258100000
CY2018	mlm	Income Tax Benefit From Operating Loss Carry Forwards Utilized During Period IncomeTaxBenefitFromOperatingLossCarryForwardsUtilizedDuringPeriod	5800000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	15100000
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	5700000
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	10600000
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2019	mlm	Effective Income Tax Rate Reconciliation Statutory Depletion Deduction EffectiveIncomeTaxRateReconciliationStatutoryDepletionDeduction	0.034
CY2018	mlm	Effective Income Tax Rate Reconciliation Statutory Depletion Deduction EffectiveIncomeTaxRateReconciliationStatutoryDepletionDeduction	0.034
CY2017	mlm	Effective Income Tax Rate Reconciliation Statutory Depletion Deduction EffectiveIncomeTaxRateReconciliationStatutoryDepletionDeduction	0.056
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.020
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.028
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.015
CY2019	mlm	Effective Income Tax Rate Reconciliation Change In Tax Status Of Subsidiary EffectiveIncomeTaxRateReconciliationChangeInTaxStatusOfSubsidiary	0.017
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.005
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.005
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.010
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.033
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.417
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Deductions EffectiveIncomeTaxRateReconciliationDeductions	0.022
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.008
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.017
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.013
CY2017	us-gaap	Income Tax Reconciliation Deductions IncomeTaxReconciliationDeductions	15500000
CY2017Q4	mlm	Increase Decrease In Net Earnings Per Share Related To Production Deduction Benefit IncreaseDecreaseInNetEarningsPerShareRelatedToProductionDeductionBenefit	0.25
CY2019Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	62600000
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.182
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.183
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.153
CY2019	us-gaap	Income Tax Reconciliation Deductions IncomeTaxReconciliationDeductions	15200000
CY2019Q4	mlm	Increase Decrease In Net Earnings Per Share Related To Production Deduction Benefit IncreaseDecreaseInNetEarningsPerShareRelatedToProductionDeductionBenefit	0.24
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0.09
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	5000000.0
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	800000
CY2018Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	52600000
CY2019Q4	mlm	Deferred Tax Assets Valuation And Other Reserves DeferredTaxAssetsValuationAndOtherReserves	22300000
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	1000000.0
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	900000
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	4200000
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	25500000
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	24100000
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	151700000
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	170600000
CY2019Q4	mlm	Deferred Tax Liabilities Right Of Use Assets DeferredTaxLiabilitiesRightOfUseAssets	112100000
CY2019Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	27400000
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	478300000
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1800000
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	10500000
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	11000000.0
CY2019Q4	us-gaap	Deferred Tax Assets Other Comprehensive Loss DeferredTaxAssetsOtherComprehensiveLoss	85200000
CY2018Q4	us-gaap	Deferred Tax Assets Other Comprehensive Loss DeferredTaxAssetsOtherComprehensiveLoss	84200000
CY2019Q4	mlm	Deferred Tax Assets Lease Liability DeferredTaxAssetsLeaseLiability	114700000
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2900000
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	3000000.0
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	298200000
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	173200000
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	9000000.0
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	8600000
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	289200000
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	164600000
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	700800000
CY2018Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	204300000
CY2019Q4	mlm	Deferred Tax Liabilities Employee Benefits DeferredTaxLiabilitiesEmployeeBenefits	30200000
CY2018Q4	mlm	Deferred Tax Liabilities Employee Benefits DeferredTaxLiabilitiesEmployeeBenefits	17000000.0
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1022200000
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	870200000
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	733000000.0
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	705600000
CY2019	mlm	Domestic And Foreign Operating Loss Carry Forward Expiration Date DomesticAndForeignOperatingLossCarryForwardExpirationDate	2039
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	10500000
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	11000000.0
CY2019Q4	us-gaap	Operating Loss Carryforwards Valuation Allowance OperatingLossCarryforwardsValuationAllowance	9000000.0
CY2018Q4	us-gaap	Operating Loss Carryforwards Valuation Allowance OperatingLossCarryforwardsValuationAllowance	8600000
CY2019	mlm	Percentage Of Impact Of Expensing Of Capital Expenditures For Tax Purposes And Change In Tax Status PercentageOfImpactOfExpensingOfCapitalExpendituresForTaxPurposesAndChangeInTaxStatus	1
CY2019	mlm	Unrecognized Tax Benefits Excluding Interest And Correlative Effects UnrecognizedTaxBenefitsExcludingInterestAndCorrelativeEffects	1700000
CY2018	mlm	Unrecognized Tax Benefits Excluding Interest And Correlative Effects UnrecognizedTaxBenefitsExcludingInterestAndCorrelativeEffects	600000
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	24100000
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	22400000
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	21800000
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	400000
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	900000
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1400000
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	700000
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1800000
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	22400000
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	15500000
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	12800000
CY2017Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	10400000
CY2017Q4	us-gaap	Income Tax Examination Liability Refund Adjustment From Settlement With Taxing Authority IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority	-3900000
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-1700000
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	1200000
CY2019Q4	us-gaap	Defined Benefit Pension Plan Liabilities Current DefinedBenefitPensionPlanLiabilitiesCurrent	6400000
CY2018Q4	us-gaap	Defined Benefit Pension Plan Liabilities Current DefinedBenefitPensionPlanLiabilitiesCurrent	9000000.0
CY2019Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	103400000
CY2018Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	121000000.0
CY2019Q4	us-gaap	Defined Benefit Pension Plan Current And Noncurrent Liabilities DefinedBenefitPensionPlanCurrentAndNoncurrentLiabilities	109800000
CY2018Q4	us-gaap	Defined Benefit Pension Plan Current And Noncurrent Liabilities DefinedBenefitPensionPlanCurrentAndNoncurrentLiabilities	130000000.0
CY2019Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	878700000
CY2018Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	771900000
CY2019Q4	us-gaap	Defined Benefit Plan Plan Assets Target Allocation Percentage DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	1
CY2019Q4	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2018Q4	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	868000000.0
CY2018Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	717900000
CY2019	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	58900000
CY2018	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	162300000
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	1000000.0
CY2019	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-1000000.0
CY2018	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	1600000
CY2019Q4	mlm	Other Postretirement Defined Benefit Plan Liabilities Current OtherPostretirementDefinedBenefitPlanLiabilitiesCurrent	2000000.0
CY2018Q4	mlm	Other Postretirement Defined Benefit Plan Liabilities Current OtherPostretirementDefinedBenefitPlanLiabilitiesCurrent	1000000.0
CY2019Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	11000000.0
CY2018Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	12300000
CY2019Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Current And Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesCurrentAndNoncurrent	13000000.0
CY2018Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Current And Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesCurrentAndNoncurrent	13300000
CY2019Q4	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear	0.0675
CY2018Q4	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear	0.070
CY2019Q4	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate1 DefinedBenefitPlanUltimateHealthCareCostTrendRate1	0.0475
CY2018Q4	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate1 DefinedBenefitPlanUltimateHealthCareCostTrendRate1	0.050
CY2019	us-gaap	Defined Benefit Plan Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate	2028
CY2018	us-gaap	Defined Benefit Plan Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate	2023
CY2019	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation	700000
CY2019	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Accumulated Postretirement Benefit Obligation1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1	600000
CY2019	us-gaap	Defined Contribution Plan Plan Name DefinedContributionPlanPlanName	401(a)
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	17600000
CY2018	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	16500000
CY2017	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	14900000
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	210390
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	95.93
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	150722
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	90.86
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	828
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	94.75
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	58840
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	108.93
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	58840
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	108.93
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	21600000
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	12400000
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	13200000
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	10000000.0
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	10000000.0
CY2019Q4	mlm	Common Stock Price CommonStockPrice	279.64
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	742000
CY2016	mlm	Share Based Compensation Arrangement By Share Based Payment Award Number Of Additional Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAvailableForGrant	800000
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	34100000
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	29300000
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	30500000
CY2019Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	23200000
CY2019	mlm	Future Share Based Compensation Expense Year One FutureShareBasedCompensationExpenseYearOne	14900000
CY2019	mlm	Future Share Based Compensation Expense Year Two FutureShareBasedCompensationExpenseYearTwo	7200000
CY2019	mlm	Future Share Based Compensation Expense Year Three FutureShareBasedCompensationExpenseYearThree	800000
CY2019	mlm	Future Share Based Compensation Expense Year Four FutureShareBasedCompensationExpenseYearFour	300000
CY2019	mlm	Future Share Based Compensation Expense FutureShareBasedCompensationExpense	23200000
CY2019	us-gaap	Lessee Finance Lease Option To Extend LesseeFinanceLeaseOptionToExtend	options to extend the leases for up to 30 years
CY2019	us-gaap	Lessee Finance Lease Option To Terminate LesseeFinanceLeaseOptionToTerminate	options to terminate the leases within one year
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	80900000
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	3400000
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	500000
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	21100000
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	33000000.0
CY2019	us-gaap	Lease Cost LeaseCost	138900000
CY2019	us-gaap	Royalty Expense RoyaltyExpense	58200000
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	481900000
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	52700000
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	433900000
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	486600000
CY2019Q4	mlm	Finance Lease Right Of Use Asset Property Plant And Equipment Gross FinanceLeaseRightOfUseAssetPropertyPlantAndEquipmentGross	18300000
CY2019Q4	mlm	Finance Lease Right Of Use Asset Accumulated Depreciation Property Plant And Equipment FinanceLeaseRightOfUseAssetAccumulatedDepreciationPropertyPlantAndEquipment	-3100000
CY2019Q4	mlm	Finance Lease Right Of Use Asset Property Plant And Equipment Net FinanceLeaseRightOfUseAssetPropertyPlantAndEquipmentNet	15200000
CY2019Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	2800000
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	5900000
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	8700000
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.043
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.052
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	71900000
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	3200000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	58900000
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	90700000
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	1900000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	53100000
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	1100000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	49200000
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	800000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	42100000
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	700000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	396100000
CY2019Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	3500000
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CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	700000
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CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	3900000
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CY2018Q4	mlm	Royalty Commitments Future Minimum Payments Due Thereafter RoyaltyCommitmentsFutureMinimumPaymentsDueThereafter	66000000.0
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	13700000
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CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Interest Included In Payments CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments	2900000
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments	10800000
CY2018Q4	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	3200000
CY2018Q4	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	7600000
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CY2019	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	400000
CY2018	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	500000
CY2017	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	500000
CY2019Q4	us-gaap	Stock Repurchase Program Remaining Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased	13700000
CY2019	mlm	Asset Retirement Obligation Depreciation And Accretion AssetRetirementObligationDepreciationAndAccretion	9100000
CY2018	mlm	Asset Retirement Obligation Depreciation And Accretion AssetRetirementObligationDepreciationAndAccretion	8000000.0
CY2017	mlm	Asset Retirement Obligation Depreciation And Accretion AssetRetirementObligationDepreciationAndAccretion	8700000
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	121800000
CY2017Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	109700000
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CY2019	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	600000
CY2018	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	4600000
CY2019	mlm	Asset Retirement Obligation Liabilities Settled Recoveries AssetRetirementObligationLiabilitiesSettledRecoveries	-1200000
CY2018	mlm	Asset Retirement Obligation Liabilities Settled Recoveries AssetRetirementObligationLiabilitiesSettledRecoveries	-2800000
CY2019	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	17100000
CY2018	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	5200000
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	143900000
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	121800000
CY2019Q4	us-gaap	Accrued Insurance Noncurrent AccruedInsuranceNoncurrent	39900000
CY2018Q4	us-gaap	Accrued Insurance Noncurrent AccruedInsuranceNoncurrent	48300000
CY2019Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	32900000
CY2019Q4	mlm	Surety Bonds SuretyBonds	395100000
CY2018Q1	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	15500000
CY2019Q4	us-gaap	Due From Affiliates DueFromAffiliates	11300000
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On First Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary	140600000
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Second Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary	15000000.0
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Third Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary	3000000.0
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fourth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary	900000
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On Fifth Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary	900000
CY2019Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Due After Five Years UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears	15900000
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CY2019	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	106700000
CY2018	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	79300000
CY2017	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	83700000
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CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4739100000
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4244300000
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3965600000
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CY2017	us-gaap	Gross Profit GrossProfit	971900000
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CY2018	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	1925600000
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CY2017	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	438600000
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CY2017	mlm	Sale Of Asset To Settle Liability SaleOfAssetToSettleLiability	900000
CY2017	mlm	Property Plant And Equipment Additions Through Acquisitions PropertyPlantAndEquipmentAdditionsThroughAcquisitions	2500000
CY2018	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	280600000
CY2017	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	262100000
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CY2019	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	387600000
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4739100000
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CY2018	us-gaap	Gross Profit GrossProfit	966600000
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CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	54200000
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	67000000.0
CY2017	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	61600000
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	2400000
CY2017	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	2500000
CY2019	mlm	Remeasurement Of Operating Lease Right Of Use Assets RemeasurementOfOperatingLeaseRightOfUseAssets	2000000.0
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CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	500000
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CY2018	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	7700000
CY2018	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	25300000
CY2017	us-gaap	Other Nonrecurring Expense OtherNonrecurringExpense	12700000
CY2019	mlm	Noncash Portion Of Asset And Portfolio Rationalization Charge NoncashPortionOfAssetAndPortfolioRationalizationCharge	17000000.0
CY2019	mlm	Cash Portion Of Asset And Portfolio Rationalization Charge CashPortionOfAssetAndPortfolioRationalizationCharge	1800000

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2019 Q4 Form 10-K Financial Statement

#000156459020005784 Filed on February 21, 2020

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$MLM MARTIN MARIETTA MATERIALS INC Stock $mlm

2019 Q4 Form 10-K Financial Statement

#000156459020005784 Filed on February 21, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

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MARTIN MARIETTA MATERIALS INC Stock $mlm