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Business Combinations, Divestitures, Discontinued Operations and Assets and Liabilities Held for Sale - Additional Information (Detail) $ in Millions |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Apr. 05, 2024 USD ($) Facility | Feb. 09, 2024 USD ($) Plant | Jan. 12, 2024 | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Dec. 31, 2023 Plant
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Revenues |  |  |  | $ 1,889 | $ 1,994 | $ 4,905 | $ 5,169 |
Pretax earnings |  |  |  | 489 | 567 | 2,308 | 1,226 |
Charges for selling acquired inventory |  |  |  |  |  |  | 20 |
Business combination periods for production level |  |  | 60 years |  |  |  |  |
Revenues |  | $ 2,100 |  |  |  |  |  |
Business combination number of south texas ready mix operations | Plant |  |  |  |  |  |  |  | 20
Divestitures number of south texas ready mix operations | Plant |  | 20 |  |  |  |  |  |
Pretax gain |  |  |  |  |  | 1,300 |  |
Income/ loss from discontinued operations |  |  |  | 0 | $ (13) | 0 | (26) |
Blue Water Industries LLC |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Number of active aggregates operations | Facility | 20 |  |  |  |  |  |  |
Payments to acquire businesses gross | $ 2,050 |  |  |  |  |  |  |
Acquisition related expenses |  |  |  |  |  |  | $ 22 |
Increase in fair value of property, plant and equipment |  |  |  | 91 |  |  |  |
Reduction in goodwill |  |  |  | 77 |  |  |  |
Albert Frei And Sons, Inc. And Blue Water Industries LLC. [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Revenues |  |  |  | 85 |  | 182 |  |
Pretax earnings |  |  |  | $ 13 |  | 25 |  |
Charges for selling acquired inventory |  |  |  |  |  | $ 20 |  |

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