XML 66 R33.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Revenue Recognition (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Revenue From Contract With Customer [Abstract] |
Schedule of Company's Total Revenues by Category for each Reportable Segment | The following table presents the Company’s total revenues by category for each reportable segment:
years ended December 31 |  | Products and Services |  |  | Freight |  |  | Total |
(in millions) |  | 2021 |
East Group |  | $ | 2,161.6 |  |  | $ | 141.4 |  |  | $ | 2,303.0 |
West Group |  |  | 2,648.4 |  |  |  | 163.9 |  |  |  | 2,812.3 |
Total Building Materials business |  |  | 4,810.0 |  |  |  | 305.3 |  |  |  | 5,115.3 |
Magnesia Specialties |  |  | 274.7 |  |  |  | 24.0 |  |  |  | 298.7 |
Total |  | $ | 5,084.7 |  |  | $ | 329.3 |  |  | $ | 5,414.0 |
|  | 2020 |
East Group |  | $ | 1,826.6 |  |  | $ | 122.5 |  |  | $ | 1,949.1 |
West Group |  |  | 2,384.6 |  |  |  | 153.5 |  |  |  | 2,538.1 |
Total Building Materials business |  |  | 4,211.2 |  |  |  | 276.0 |  |  |  | 4,487.2 |
Magnesia Specialties |  |  | 220.9 |  |  |  | 21.8 |  |  |  | 242.7 |
Total |  | $ | 4,432.1 |  |  | $ | 297.8 |  |  |  | 4,729.9 |
|  | 2019 |
East Group |  | $ | 1,814.5 |  |  | $ | 134.5 |  |  | $ | 1,949.0 |
West Group |  |  | 2,357.9 |  |  |  | 160.9 |  |  |  | 2,518.8 |
Total Building Materials business |  |  | 4,172.4 |  |  |  | 295.4 |  |  |  | 4,467.8 |
Magnesia Specialties |  |  | 249.9 |  |  |  | 21.4 |  |  |  | 271.3 |
Total |  | $ | 4,422.3 |  |  | $ | 316.8 |  |  | $ | 4,739.1 |
Summary of Information About the Company's Contract Balances | The following table presents information about the Company’s contract balances:
December 31 |  |  |  |  |  |  |  |
(in millions) |  | 2021 |  |  | 2020 |
Costs in excess of billings |  | $ | 4.3 |  |  | $ | 2.2 |
Billings in excess of costs |  | $ | 7.8 |  |  | $ | 14.0 |

X
- Definition Schedule of revenue by category for reportable segment. + References No definition available. + Details
Name: | mlm_ScheduleOfRevenueByCategoryForReportableSegmentTableTextBlock
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 -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045 + Details
Name: | us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration