XML 63 R51.htm IDEA: XBRL DOCUMENT
v3.19.1

Business Segments - Financial Data for Continuing Operations for Company's Reportable Business Segments (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |
Total Revenues | $ 938,955 | $ 802,004 |
Earnings (Loss) from operations | 69,221 | 39,081 |
Assets employed | 10,048,407 |  | $ 9,551,419
Products and Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Revenues | 878,305 | 753,305 |
Building Materials Business |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Revenues | 864,881 | 732,742 |
Earnings (Loss) from operations | 72,025 | 43,159 |
Assets employed | 9,572,358 |  | 9,077,562
Building Materials Business | Products and Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Revenues | 809,131 | 688,436 |
Operating Segments | Building Materials Business Mid-America Group |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Revenues | 248,813 | 178,781 |
Earnings (Loss) from operations | 30,955 | 6,167 |
Assets employed | 2,848,652 |  | 2,788,454
Operating Segments | Building Materials Business Mid-America Group | Products and Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Revenues | 230,308 | 167,890 |
Operating Segments | Building Materials Business Southeast Group |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Revenues | 119,237 | 80,239 |
Earnings (Loss) from operations | 21,134 | 2,041 |
Assets employed | 1,443,597 |  | 1,299,469
Operating Segments | Building Materials Business Southeast Group | Products and Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Revenues | 115,312 | 77,563 |
Operating Segments | Building Materials Business West Group |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Revenues | 496,831 | 473,722 |
Earnings (Loss) from operations | 19,936 | 34,951 |
Assets employed | 5,280,109 |  | 4,989,639
Operating Segments | Building Materials Business West Group | Products and Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Revenues | 463,511 | 442,983 |
Operating Segments | Magnesia Specialties |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Revenues | 74,074 | 69,262 |
Earnings (Loss) from operations | 22,642 | 21,237 |
Assets employed | 170,833 |  | 156,106
Operating Segments | Magnesia Specialties | Products and Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Revenues | 69,174 | 64,869 |
Operating Segments | Building Materials Business |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Revenues | 864,881 | 732,742 |
Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Earnings (Loss) from operations | (25,446) | $ (25,315) |
Assets employed | $ 305,216 |  | $ 317,751

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_Assets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ProductOrServiceAxis=mlm_ProductsAndServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mlm_BuildingMaterialsBusinessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mlm_BuildingMaterialsBusinessMidAmericaGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mlm_BuildingMaterialsBusinessSoutheastGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mlm_BuildingMaterialsBusinessWestGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mlm_MagnesiaSpecialtiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |