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Segments (Tables) | 12 Months Ended
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Dec. 31, 2023
Segment Reporting [Abstract] |
Financial Data for Continuing Operation for Company's Reportable Business Segments | The following tables display selected financial data for the Company’s reportable segments. Total revenues, as presented on the consolidated statements of 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.
years ended December 31 (in millions) Total revenues |  | 2023 |  |  | 2022 |  |  | 2021 |
East Group |  | $ | 2,763.4 |  |  | $ | 2,468.1 |  |  | $ | 2,303.0 |
West Group |  |  | 3,698.4 |  |  |  | 3,388.6 |  |  |  | 2,812.3 |
Total Building Materials business |  |  | 6,461.8 |  |  |  | 5,856.7 |  |  |  | 5,115.3 |
Magnesia Specialties |  |  | 315.4 |  |  |  | 304.0 |  |  |  | 298.7 |
Total |  | $ | 6,777.2 |  |  | $ | 6,160.7 |  |  | $ | 5,414.0 |
years ended December 31 (in millions) Earnings (Loss) from operations |  | 2023 |  |  | 2022 |  |  | 2021 |
East Group |  | $ | 857.1 |  |  | $ | 640.2 |  |  | $ | 621.7 |
West Group |  |  | 777.1 |  |  |  | 588.1 |  |  |  | 385.2 |
Total Building Materials business |  |  | 1,634.2 |  |  |  | 1,228.3 |  |  |  | 1,006.9 |
Magnesia Specialties |  |  | 76.0 |  |  |  | 75.2 |  |  |  | 90.8 |
Total reportable segments |  |  | 1,710.2 |  |  |  | 1,303.5 |  |  |  | 1,097.7 |
Corporate |  |  | (114.2 | ) |  |  | (96.8 | ) |  |  | (123.9 | )
Consolidated earnings from operations |  |  | 1,596.0 |  |  |  | 1,206.7 |  |  |  | 973.8 |
Interest expense |  |  | 165.3 |  |  |  | 169.0 |  |  |  | 142.7 |
Other nonoperating income, net |  |  | (62.1 | ) |  |  | (53.4 | ) |  |  | (24.4 | )
Consolidated earnings from continuing operations before income tax expense |  | $ | 1,492.8 |  |  | $ | 1,091.1 |  |  | $ | 855.5 |
Earnings from operations for the West Group included a nonrecurring gain on divestiture of $151.9 million in 2022.
December 31 (in millions) Assets employed |  | 2023 |  |  | 2022 |  |  | 2021 |
East Group |  | $ | 5,131.1 |  |  | $ | 5,063.5 |  |  | $ | 5,009.0 |
West Group |  |  | 7,696.7 |  |  |  | 7,908.4 |  |  |  | 8,264.8 |
Total Building Materials business |  |  | 12,827.8 |  |  |  | 12,971.9 |  |  |  | 13,273.8 |
Magnesia Specialties |  |  | 250.0 |  |  |  | 192.1 |  |  |  | 168.7 |
Total reportable segments |  |  | 13,077.8 |  |  |  | 13,164.0 |  |  |  | 13,442.5 |
Corporate |  |  | 2,047.1 |  |  |  | 1,829.6 |  |  |  | 950.5 |
Total |  | $ | 15,124.9 |  |  | $ | 14,993.6 |  |  | $ | 14,393.0 |
years ended December 31 (in millions) Depreciation, depletion and amortization |  | 2023 |  |  | 2022 |  |  | 2021 |
East Group |  | $ | 210.1 |  |  | $ | 210.4 |  |  | $ | 196.0 |
West Group |  |  | 268.0 |  |  |  | 260.6 |  |  |  | 223.0 |
Total Building Materials business |  |  | 478.1 |  |  |  | 471.0 |  |  |  | 419.0 |
Magnesia Specialties |  |  | 12.5 |  |  |  | 12.2 |  |  |  | 12.3 |
Total reportable segments |  |  | 490.6 |  |  |  | 483.2 |  |  |  | 431.3 |
Corporate |  |  | 22.6 |  |  |  | 22.8 |  |  |  | 20.4 |
Total |  | $ | 513.2 |  |  | $ | 506.0 |  |  | $ | 451.7 |
Corporate depreciation, depletion and amortization included $5.9 million, $6.6 million and $5.2 million for the amortization of bond discount and debt issuance costs in 2023, 2022 and 2021, respectively.
years ended December 31 (in millions) Total property additions, including the impact of acquisitions |  | 2023 |  |  | 2022 |  |  | 2021 |
East Group |  | $ | 230.8 |  |  | $ | 189.1 |  |  | $ | 372.9 |
West Group |  |  | 341.7 |  |  |  | 302.2 |  |  |  | 1,131.6 |
Total Building Materials business |  |  | 572.5 |  |  |  | 491.3 |  |  |  | 1,504.5 |
Magnesia Specialties |  |  | 39.3 |  |  |  | 32.0 |  |  |  | 8.2 |
Total reportable segments |  |  | 611.8 |  |  |  | 523.3 |  |  |  | 1,512.7 |
Corporate |  |  | 14.4 |  |  |  | 21.1 |  |  |  | 28.8 |
Total |  | $ | 626.2 |  |  | $ | 544.4 |  |  | $ | 1,541.5 |
years ended December 31 (in millions) Property additions through acquisitions |  | 2023 |  |  | 2022 |  |  | 2021 |
East Group |  | $ | — |  |  | $ | — |  |  | $ | 169.2 |
West Group |  |  | — |  |  |  | 2.5 |  |  |  | 918.3 |
Total Building Materials business |  |  | — |  |  |  | 2.5 |  |  |  | 1,087.5 |
Magnesia Specialties |  |  | — |  |  |  | — |  |  |  | — |
Total reportable segments |  |  | — |  |  |  | 2.5 |  |  |  | 1,087.5 |
Corporate |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | — |  |  | $ | 2.5 |  |  | $ | 1,087.5 |

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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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