XML 45 R32.htm IDEA: XBRL DOCUMENT
v3.21.2

Revenues and Gross Profit (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2021
Revenues And Gross Profit [Abstract] |
Total Revenues and Gross Profit by Product Line | The following table, which is reconciled to consolidated amounts, provides total revenues and gross profit by product line.
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
|  | (Dollars in Millions) |
Total revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Building Materials business: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Products and services: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregates |  | $ | 801.8 |  |  | $ | 754.9 |  |  | $ | 1,374.4 |  |  | $ | 1,325.2 |
Cement |  |  | 116.5 |  |  |  | 109.5 |  |  |  | 226.1 |  |  |  | 216.1 |
Ready mixed concrete |  |  | 268.4 |  |  |  | 245.1 |  |  |  | 503.7 |  |  |  | 434.8 |
Asphalt and paving services |  |  | 135.3 |  |  |  | 107.0 |  |  |  | 147.6 |  |  |  | 125.1 |
Less: interproduct revenues |  |  | (96.7 | ) |  |  | (75.9 | ) |  |  | (169.8 | ) |  |  | (129.5 | )
Products and services |  |  | 1,225.3 |  |  |  | 1,140.6 |  |  |  | 2,082.0 |  |  |  | 1,971.7 |
Freight |  |  | 76.8 |  |  |  | 76.4 |  |  |  | 131.6 |  |  |  | 137.9 |
Total Building Materials business |  |  | 1,302.1 |  |  |  | 1,217.0 |  |  |  | 2,213.6 |  |  |  | 2,109.6 |
Magnesia Specialties: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Products and services |  |  | 70.0 |  |  |  | 48.9 |  |  |  | 135.2 |  |  |  | 108.8 |
Freight |  |  | 5.8 |  |  |  | 4.7 |  |  |  | 11.5 |  |  |  | 10.5 |
Total Magnesia Specialties |  |  | 75.8 |  |  |  | 53.6 |  |  |  | 146.7 |  |  |  | 119.3 |
Total |  | $ | 1,377.9 |  |  | $ | 1,270.6 |  |  | $ | 2,360.3 |  |  | $ | 2,228.9 |
Gross profit (loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Building Materials business: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Products and services: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregates |  | $ | 273.0 |  |  | $ | 268.0 |  |  | $ | 394.7 |  |  | $ | 361.3 |
Cement |  |  | 36.1 |  |  |  | 43.4 |  |  |  | 51.4 |  |  |  | 70.7 |
Ready mixed concrete |  |  | 19.1 |  |  |  | 26.1 |  |  |  | 38.6 |  |  |  | 32.0 |
Asphalt and paving services |  |  | 28.7 |  |  |  | 21.9 |  |  |  | 20.4 |  |  |  | 13.8 |
Products and services |  |  | 356.9 |  |  |  | 359.4 |  |  |  | 505.1 |  |  |  | 477.8 |
Freight |  |  | 0.7 |  |  |  | (0.3 | ) |  |  | 0.5 |  |  |  | (0.6 | )
Total Building Materials business |  |  | 357.6 |  |  |  | 359.1 |  |  |  | 505.6 |  |  |  | 477.2 |
Magnesia Specialties: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Products and services |  |  | 27.9 |  |  |  | 18.2 |  |  |  | 56.3 |  |  |  | 44.3 |
Freight |  |  | (0.9 | ) |  |  | (1.3 | ) |  |  | (1.9 | ) |  |  | (2.2 | )
Total Magnesia Specialties |  |  | 27.0 |  |  |  | 16.9 |  |  |  | 54.4 |  |  |  | 42.1 |
Corporate |  |  | 0.5 |  |  |  | 4.5 |  |  |  | (0.2 | ) |  |  | 3.6 |
Total |  | $ | 385.1 |  |  | $ | 380.5 |  |  | $ | 559.8 |  |  | $ | 522.9 |

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: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration