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v3.25.3

Significant Accounting Policies - Additional Information (Detail) $ in Millions | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 USD ($) Facility State Segment | Dec. 31, 2023 | Dec. 31, 2024 USD ($)
Significant Accounting Policies [Line Items] |  |  |
Number of quarries and yards | Facility | 390 |  |
Number of states in which entity operates | State | 28 |  |
Reportable business segments | Segment | 2 |  |
Restricted cash | $ 13 |  | $ 0
Number of days restricted from utilizing cash | 180 days |  |
Percentage of minimum amount of income tax payments net of refunds received |  | 5.00% |
Letter of Credit |  |  |
Significant Accounting Policies [Line Items] |  |  |
Restricted cash | $ 4 |  |
Replacement Assets |  |  |
Significant Accounting Policies [Line Items] |  |  |
Restricted cash | $ 9 |  |

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