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Revenues and Gross Profit - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Revenue Recognition [Line Items] |  |  |  |  |
Gross profit | $ 517 | $ 560 | $ 790 | $ 863 |
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 | 377 | 358 | $ 377 | 358 |
Service revenues | 1,764 | 1,821 | 3,015 | 3,175 |
Revenue recognized from contract liabilities | 6 | 5 | 8 | 8 |
Retainage on contracts | 12 |  | 12 |  | $ 17
Interproduct Revenues |  |  |  |  |
Revenue Recognition [Line Items] |  |  |  |  |
Service revenues | (65) | (65) | (102) | (104) |
West Group | Operating Segments |  |  |  |  |
Revenue Recognition [Line Items] |  |  |  |  |
Service revenues | 860 | 1,005 | 1,505 | 1,746 |
Service |  |  |  |  |
Revenue Recognition [Line Items] |  |  |  |  |
Service revenues |  |  | $ 143 | 134 |
Service | CALIFORNIA and COLORADO | West Group |  |  |  |  |
Revenue Recognition [Line Items] |  |  |  |  |
Service revenues | $ 117 | 108 |  |  |
Cement | Operating Segments |  |  |  |  |
Revenue Recognition [Line Items] |  |  |  |  |
Gross profit |  | 93 |  | 140 |
Service revenues |  | 198 |  | 366 |
Ready Mixed Concrete | Operating Segments |  |  |  |  |
Revenue Recognition [Line Items] |  |  |  |  |
Gross profit |  | 35 |  | 47 |
Service revenues |  | 271 |  | 491 |
Ready Mixed Concrete | Operating Segments | Interproduct Revenues |  |  |  |  |
Revenue Recognition [Line Items] |  |  |  |  |
Service revenues |  | $ 56 |  | $ 104 |
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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