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Business Combinations, Divestitures, Discontinued Operations and Assets and Liabilities Held for Sale - Summary of Unaudited Pro Forma Financial Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Business Combinations [Abstract] |  |  |  |
Revenues | $ 1,764 | $ 1,876 | $ 3,067 | $ 3,277
Net earnings from continuing operations attributable to Martin Marietta | $ 324 | $ 342 | $ 1,373 | $ 420

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