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v3.25.1

Revenues and Gross Profit - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Revenue Recognition [Line Items] |  |
Gross profit | $ 335 | $ 272
Performance obligations, description of timing | Performance obligations within paving service agreements are satisfied over time, primarily ranging from one day to two years. Customer payments for the paving operations are based on a contractual billing schedule and are typically "paid-when-paid", meaning the Company is paid once the customer is paid. |
Future revenues from unsatisfied performance obligations | $ 297 | 246
Service revenues | 1,353 | 1,251
Interproduct Revenues |  |
Revenue Recognition [Line Items] |  |
Service revenues | (49) | (39)
West Group | Operating Segments |  |
Revenue Recognition [Line Items] |  |
Service revenues | 667 | 644
Service | CALIFORNIA and COLORADO | West Group |  |
Revenue Recognition [Line Items] |  |
Service revenues | $ 36 | $ 26
Minimum | Service |  |
Revenue Recognition [Line Items] |  |
Performance obligations, period | 1 day |
Maximum | Service |  |
Revenue Recognition [Line Items] |  |
Performance obligations, period | 2 years |

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