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Segments (Tables) | 12 Months Ended
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Dec. 31, 2021
Segment Reporting [Abstract] |
Financial Data for Continuing Operation for Company's Reportable Segments | The following tables display selected financial data for the Company’s reportable segments. Total revenues, as well as the consolidated statements of earnings and comprehensive earnings, reflect the elimination of intersegment revenues. Total revenues; gross profit; selling, general and administrative expenses and earnings from operations reflect continuing operations only.
years ended December 31 (in millions) Total revenues |  | 2021 |  |  | 2020 |  |  | 2019 |
East Group |  | $ | 2,303.0 |  |  | $ | 1,949.1 |  |  | $ | 1,949.0 |
West Group |  |  | 2,812.3 |  |  |  | 2,538.1 |  |  |  | 2,518.8 |
Total Building Materials business |  |  | 5,115.3 |  |  |  | 4,487.2 |  |  |  | 4,467.8 |
Magnesia Specialties |  |  | 298.7 |  |  |  | 242.7 |  |  |  | 271.3 |
Total |  | $ | 5,414.0 |  |  | $ | 4,729.9 |  |  | $ | 4,739.1 |
Gross profit |  |  |  |  |  |  |  |  |  |  |  |
East Group |  | $ | 721.6 |  |  | $ | 619.4 |  |  | $ | 605.7 |
West Group |  |  | 518.3 |  |  |  | 540.4 |  |  |  | 474.9 |
Total Building Materials business |  |  | 1,239.9 |  |  |  | 1,159.8 |  |  |  | 1,080.6 |
Magnesia Specialties |  |  | 106.5 |  |  |  | 85.5 |  |  |  | 95.4 |
Corporate |  |  | 2.0 |  |  |  | 7.5 |  |  |  | 3.0 |
Total |  | $ | 1,348.4 |  |  | $ | 1,252.8 |  |  | $ | 1,179.0 |
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  |  |  |
East Group |  | $ | 104.6 |  |  | $ | 99.2 |  |  | $ | 84.7 |
West Group |  |  | 142.6 |  |  |  | 135.7 |  |  |  | 116.3 |
Total Building Materials business |  |  | 247.2 |  |  |  | 234.9 |  |  |  | 201.0 |
Magnesia Specialties |  |  | 14.9 |  |  |  | 14.1 |  |  |  | 11.3 |
Corporate |  |  | 88.9 |  |  |  | 56.9 |  |  |  | 90.4 |
Total |  | $ | 351.0 |  |  | $ | 305.9 |  |  | $ | 302.7 |
Earnings (Loss) from operations |  |  |  |  |  |  |  |  |  |  |  |
East Group |  | $ | 621.7 |  |  | $ | 522.1 |  |  | $ | 527.3 |
West Group |  |  | 385.2 |  |  |  | 471.3 |  |  |  | 366.9 |
Total Building Materials business |  |  | 1,006.9 |  |  |  | 993.4 |  |  |  | 894.2 |
Magnesia Specialties |  |  | 90.8 |  |  |  | 70.7 |  |  |  | 83.6 |
Corporate |  |  | (123.9 | ) |  |  | (58.7 | ) |  |  | (92.9 | )
Total |  | $ | 973.8 |  |  | $ | 1,005.4 |  |  | $ | 884.9 |
Earnings from operations for the West Group include nonrecurring gains on sales of investment land and divested assets of $69.9 million in 2020.
December 31 (in millions) Assets employed |  | 2021 |  |  | 2020 |  |  | 2019 |
East Group |  | $ | 5,009.0 |  |  | $ | 4,342.5 |  |  | $ | 4,320.6 |
West Group |  |  | 8,264.8 |  |  |  | 5,355.5 |  |  |  | 5,321.9 |
Total Building Materials business |  |  | 13,273.8 |  |  |  | 9,698.0 |  |  |  | 9,642.5 |
Magnesia Specialties |  |  | 168.7 |  |  |  | 167.9 |  |  |  | 176.2 |
Corporate |  |  | 950.5 |  |  |  | 714.9 |  |  |  | 312.9 |
Total |  | $ | 14,393.0 |  |  | $ | 10,580.8 |  |  | $ | 10,131.6 |
years ended December 31 (in millions) Depreciation, depletion and amortization |  | 2021 |  |  | 2020 |  |  | 2019 |
East Group |  | $ | 196.0 |  |  | $ | 167.9 |  |  | $ | 158.0 |
West Group |  |  | 223.0 |  |  |  | 196.6 |  |  |  | 183.3 |
Total Building Materials business |  |  | 419.0 |  |  |  | 364.5 |  |  |  | 341.3 |
Magnesia Specialties |  |  | 12.3 |  |  |  | 11.5 |  |  |  | 10.2 |
Corporate |  |  | 20.4 |  |  |  | 17.5 |  |  |  | 20.0 |
Total |  | $ | 451.7 |  |  | $ | 393.5 |  |  | $ | 371.5 |
Total property additions, including the impact of acquisitions |  |  |  |  |  |  |  |  |  |  |  |
East Group |  | $ | 372.9 |  |  | $ | 159.0 |  |  | $ | 172.9 |
West Group |  |  | 1,131.6 |  |  |  | 197.9 |  |  |  | 182.7 |
Total Building Materials business |  |  | 1,504.5 |  |  |  | 356.9 |  |  |  | 355.6 |
Magnesia Specialties |  |  | 8.2 |  |  |  | 13.5 |  |  |  | 20.0 |
Corporate |  |  | 28.8 |  |  |  | 16.8 |  |  |  | 12.0 |
Total |  | $ | 1,541.5 |  |  | $ | 387.2 |  |  | $ | 387.6 |
Property additions through acquisitions |  |  |  |  |  |  |  |  |  |  |  |
East Group |  | $ | 169.2 |  |  | $ | — |  |  | $ | — |
West Group |  |  | 918.3 |  |  |  | 20.0 |  |  |  | — |
Total Building Materials business |  |  | 1,087.5 |  |  |  | 20.0 |  |  |  | — |
Magnesia Specialties |  |  | — |  |  |  | — |  |  |  | — |
Corporate |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | 1,087.5 |  |  | $ | 20.0 |  |  | $ | — |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599 + Details
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