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Business Combinations, Divestitures and Discontinued Operations - Additional Information (Detail) $ in Millions |  |  |  |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | --- | ---
Apr. 01, 2022 USD ($) | Oct. 01, 2021 USD ($) | Jul. 30, 2021 | Apr. 30, 2021 | Jun. 30, 2022 USD ($) | Jun. 30, 2022 USD ($) Plant
Business Acquisition [Line Items] |  |  |  |  |  |
Assumed asset retirement obligations liability |  |  |  |  | $ 46.6 | $ 57.8
Cash used for operating and investing activities for discontinued operations |  |  |  |  |  | 224.2
Proceeds from divestitures |  |  |  |  |  | 235.0
Capital expenditures |  |  |  |  |  | $ 13.2
Business combination number of California ready mix operations | Plant |  |  |  |  |  | 14
Total Revenues |  |  |  |  | 235.0 | $ 235.0
Interest payable |  |  |  |  |  | 15.0
Cement and California Ready Mix Businesses |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Amortization or depreciation expense |  |  |  |  | 0.0 | 0.0
Colorado and Central Texas |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Pretax gain | $ 151.7 |  |  |  | $ 151.7 | $ 151.7
Lehigh West Region |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business combination, effective date |  | 2021-10 |  |  |  |
Cash transferred in business combination |  | $ 2,260.0 |  |  |  |
Southern Crushed Concrete |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business combination, effective date |  |  | 2021-07 |  |  |
Tiller Corporation |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business combination, effective date |  |  |  | 2021-04 |  |

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