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Segments (Tables) | 9 Months Ended
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Sep. 30, 2023
Segment Reporting [Abstract] |
Financial Data for Continuing Operation for Company's Reportable Business Segments | The following table displays selected financial data for the Company’s reportable segments. Total revenues, as presented on the consolidated statements of earnings and comprehensive earnings, reflect the elimination of intersegment revenues, which represent sales from one segment to another segment. Total revenues and earnings (loss) from operations reflect continuing operations only. For the nine months ended September 30, 2022, earnings from operations for the West Group included a nonrecurring gain on divested assets of $151.9 million.
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
|  | (Dollars in Millions) |
Total revenues: |  |  |  |  |  |  |  |  |  |  |  |
East Group |  | $ | 814.3 |  |  | $ | 773.6 |  |  | $ | 2,079.0 |  |  | $ | 1,866.9 |
West Group |  |  | 1,104.3 |  |  |  | 962.4 |  |  |  | 2,850.6 |  |  |  | 2,582.9 |
Total Building Materials business |  |  | 1,918.6 |  |  |  | 1,736.0 |  |  |  | 4,929.6 |  |  |  | 4,449.8 |
Magnesia Specialties |  |  | 75.5 |  |  |  | 75.7 |  |  |  | 239.4 |  |  |  | 234.4 |
Total |  | $ | 1,994.1 |  |  | $ | 1,811.7 |  |  | $ | 5,169.0 |  |  | $ | 4,684.2 |
Earnings (Loss) from operations: |  |  |  |  |  |  |  |  |  |  |  |
East Group |  | $ | 295.2 |  |  | $ | 239.4 |  |  | $ | 631.6 |  |  | $ | 478.0 |
West Group |  |  | 283.0 |  |  |  | 159.7 |  |  |  | 617.3 |  |  |  | 477.2 |
Total Building Materials business |  |  | 578.2 |  |  |  | 399.1 |  |  |  | 1,248.9 |  |  |  | 955.2 |
Magnesia Specialties |  |  | 16.9 |  |  |  | 16.5 |  |  |  | 60.8 |  |  |  | 58.4 |
Total reportable segments |  |  | 595.1 |  |  |  | 415.6 |  |  |  | 1,309.7 |  |  |  | 1,013.6 |
Corporate |  |  | (28.5 | ) |  |  | (9.7 | ) |  |  | (83.8 | ) |  |  | (69.2 | )
Consolidated earnings from operations |  |  | 566.6 |  |  |  | 405.9 |  |  |  | 1,225.9 |  |  |  | 944.4 |
Interest expense |  |  | 40.8 |  |  |  | 42.8 |  |  |  | 125.1 |  |  |  | 126.4 |
Other nonoperating income, net |  |  | (14.3 | ) |  |  | (7.3 | ) |  |  | (49.2 | ) |  | $ | (40.1 | )
Consolidated earnings from continuing operations before income tax expense |  | $ | 540.1 |  |  | $ | 370.4 |  |  | $ | 1,150.0 |  |  | $ | 858.1 |

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482573/350-20-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-25 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-30 + Details
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