XML 92 R59.htm IDEA: XBRL DOCUMENT
v3.22.4

Goodwill and Other Intangible Assets - Intangible Assets Deemed to Indefinite Life that are Therefore Not Amortized (Detail) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |
Indefinite life intangible assets | $ 35.8 | $ 36.0
Operating Permits |  |
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |
Indefinite life intangible assets | 6.6 | 6.6
Use Rights |  |
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |
Indefinite life intangible assets | 26.7 | 26.7
Trade names |  |
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |
Indefinite life intangible assets | 2.5 | 2.7
Building Materials Business |  |
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |
Indefinite life intangible assets | 33.3 | 33.5
Building Materials Business | Operating Permits |  |
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |
Indefinite life intangible assets | 6.6 | 6.6
Building Materials Business | Use Rights |  |
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |
Indefinite life intangible assets | 26.7 | 26.7
Building Materials Business | Trade names |  |
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |
Indefinite life intangible assets | 0.0 | 0.2
Magnesia Specialties |  |
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |
Indefinite life intangible assets | 2.5 | 2.5
Magnesia Specialties | Operating Permits |  |
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |
Indefinite life intangible assets | 0.0 | 0.0
Magnesia Specialties | Use Rights |  |
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |
Indefinite life intangible assets | 0.0 | 0.0
Magnesia Specialties | Trade names |  |
Indefinite Lived Intangible Assets By Major Class [Line Items] |  |
Indefinite life intangible assets | $ 2.5 | $ 2.5

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_IndefiniteLivedIntangibleAssetsByMajorClassLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=mlm_OperatingPermitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_UseRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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