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Revenue Recognition (Tables) | 12 Months Ended
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Dec. 31, 2022
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) |  | 2022 |
East Group |  | $ | 2,324.1 |  |  | $ | 144.0 |  |  | $ | 2,468.1 |
West Group |  |  | 3,128.4 |  |  |  | 260.2 |  |  |  | 3,388.6 |
Total Building Materials business |  |  | 5,452.5 |  |  |  | 404.2 |  |  |  | 5,856.7 |
Magnesia Specialties |  |  | 278.0 |  |  |  | 26.0 |  |  |  | 304.0 |
Total |  | $ | 5,730.5 |  |  | $ | 430.2 |  |  | $ | 6,160.7 |
|  | 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 |
Summary of Information About the Company's Contract Balances | The following table presents information about the Company’s contract balances:
December 31 |  |  |  |  |  |
(in millions) |  | 2022 |  |  | 2021 |
Costs in excess of billings |  | $ | 5.1 |  |  | $ | 4.3 |
Billings in excess of costs |  | $ | 10.5 |  |  | $ | 7.8 |

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- 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 https://asc.fasb.org/extlink&oid=126920106&loc=SL49130551-203045 + Details
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