XML 39 R31.htm IDEA: XBRL DOCUMENT
v3.24.2.u1

Revenues and Gross Profit (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2024
Revenues And Gross Profit [Abstract] |
Total Revenues and Gross Profit (Loss) by Product Line | The following tables, which are reconciled to consolidated amounts, provide revenues and gross profit (loss) by line of business: Building Materials (further divided by product line) and Magnesia Specialties. Interproduct revenues represent sales from the aggregates product line to the cement and ready mixed concrete and asphalt and paving product lines. Effective January 1, 2024, the Company combined the cement and ready mixed concrete product lines. This change was driven by the reduced significance of each of these product lines relative to the Building Materials business and consolidated operating results from recent divestitures. Additionally, there is a significant relationship between these product lines, as the ready mixed concrete product line is a significant customer of the cement product line. Revenues and gross profit (loss) reflect continuing operations only.
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |
|  | (Dollars in Millions) |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Building Materials business: |  |  |  |  |  |  |  |  |  |  |  |
Aggregates |  | $ | 1,242 |  |  | $ | 1,151 |  |  | $ | 2,127 |  |  | $ | 2,063 |
Cement and ready mixed concrete |  |  | 261 |  |  |  | 413 |  |  |  | 526 |  |  |  | 753 |
Asphalt and paving services |  |  | 245 |  |  |  | 241 |  |  |  | 303 |  |  |  | 299 |
Less: interproduct revenues |  |  | (65 | ) |  |  | (65 | ) |  |  | (102 | ) |  |  | (104 | )
Total Building Materials business |  |  | 1,683 |  |  |  | 1,740 |  |  |  | 2,854 |  |  |  | 3,011 |
Magnesia Specialties |  |  | 81 |  |  |  | 81 |  |  |  | 161 |  |  |  | 164 |
Total |  | $ | 1,764 |  |  | $ | 1,821 |  |  | $ | 3,015 |  |  | $ | 3,175 |
Gross profit (loss): |  |  |  |  |  |  |  |  |  |  |  |
Building Materials business: |  |  |  |  |  |  |  |  |  |  |  |
Aggregates |  | $ | 392 |  |  | $ | 371 |  |  | $ | 632 |  |  | $ | 609 |
Cement and ready mixed concrete |  |  | 72 |  |  |  | 129 |  |  |  | 103 |  |  |  | 187 |
Asphalt and paving services |  |  | 37 |  |  |  | 36 |  |  |  | 15 |  |  |  | 16 |
Total Building Materials business |  |  | 501 |  |  |  | 536 |  |  |  | 750 |  |  |  | 812 |
Magnesia Specialties |  |  | 27 |  |  |  | 28 |  |  |  | 56 |  |  |  | 53 |
Corporate |  |  | (11 | ) |  |  | (4 | ) |  |  | (16 | ) |  |  | (2 | )
Total |  | $ | 517 |  |  | $ | 560 |  |  | $ | 790 |  |  | $ | 863 |
Summary of Information About the Company's Contract Balances | The following table presents information about the Company’s contract balances:
|  | June 30, 2024 |  |  | December 31, 2023 |
|  | (Dollars in Millions) |
Costs in excess of billings |  | $ | 17 |  |  | $ | 5 |
Billings in excess of costs |  | $ | 10 |  |  | $ | 10 |

X
- Definition Revenues and gross profit. + References No definition available. + Details
Name: | mlm_RevenuesAndGrossProfitAbstract
Namespace Prefix: | mlm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of entity wide revenue and gross profit from external customers by products and services. + References No definition available. + Details
Name: | mlm_ScheduleOfEntityWideRevenueAndGrossProfitFromExternalCustomersByProductsAndServicesTextBlock
Namespace Prefix: | mlm_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 + Details
Name: | us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration