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Commitments and Contingencies - Schedule of Future Minimum Contracts of Affreightment and Royalty Commitments for All Noncancelable Agreements (Detail) $ in Millions | Dec. 31, 2023 USD ($)
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Commitments and Contingencies Disclosure [Abstract] |
2024 | $ 16.9
2025 | 17.1
2026 | 17.4
2027 | 17.7
2028 | 0.0
Thereafter | 0.0
Total | 69.1
2024 | 26.4
2025 | 14.1
2026 | 11.7
2027 | 11.2
2028 | 8.0
Thereafter | 77.4
Total | $ 148.8

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- Definition Future minimum lease commitments related to contracts of affreightment. + References No definition available. + Details
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Namespace Prefix: | mlm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Future minimum lease commitments related to contracts of affreightment due after year five. + References No definition available. + Details
Name: | mlm_FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightmentDueAfterYearFive
Namespace Prefix: | mlm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Future minimum lease commitments related to contracts of affreightment due next twelve months. + References No definition available. + Details
Name: | mlm_FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightmentDueNextTwelveMonths
Namespace Prefix: | mlm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Future minimum lease commitments related to contracts of affreightment due year five. + References No definition available. + Details
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Namespace Prefix: | mlm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Future minimum lease commitments related to contracts of affreightment due year four. + References No definition available. + Details
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Namespace Prefix: | mlm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Future minimum lease commitments related to contracts of affreightment due year three. + References No definition available. + Details
Name: | mlm_FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightmentDueYearThree
Namespace Prefix: | mlm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Future minimum lease commitments related to contracts of affreightment due year two. + References No definition available. + Details
Name: | mlm_FutureMinimumLeaseCommitmentsRelatedToContractsOfAffreightmentDueYearTwo
Namespace Prefix: | mlm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Royalty commitments future minimum payments due. + References No definition available. + Details
Name: | mlm_RoyaltyCommitmentsFutureMinimumPaymentsDue
Namespace Prefix: | mlm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Royalty commitments future minimum payments due after year five. + References No definition available. + Details
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Namespace Prefix: | mlm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Royalty commitments future minimum payments due next 12 months. + References No definition available. + Details
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Namespace Prefix: | mlm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Royalty commitments future minimum payments due year five. + References No definition available. + Details
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Namespace Prefix: | mlm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Royalty commitments future minimum payments due year four. + References No definition available. + Details
Name: | mlm_RoyaltyCommitmentsFutureMinimumPaymentsDueYearFour
Namespace Prefix: | mlm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Royalty commitments future minimum payments due year three. + References No definition available. + Details
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Namespace Prefix: | mlm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Royalty commitments future minimum payments due year two. + References No definition available. + Details
Name: | mlm_RoyaltyCommitmentsFutureMinimumPaymentsDueYearTwo
Namespace Prefix: | mlm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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