Revenues and Gross Profit - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenue Recognition [Line Items]
Gross Profit	$ 1,878	$ 2,023	$ 1,423
Performance obligations, description of timing	Performance obligations within paving service agreements are satisfied over time, primarily ranging from one day to two years. Customer payment terms are generally 30 days from invoice date. 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	$ 255	251	239
Service revenues	$ 6,536	6,777	6,161
Product and freight revenues customer payment terms	30 days
Interproduct Revenues
Revenue Recognition [Line Items]
Service revenues	$ (250)	(245)	(205)
West Group | Operating Segments
Revenue Recognition [Line Items]
Service revenues	3,275	3,699	3,389
Service | CALIFORNIA and COLORADO | West Group
Revenue Recognition [Line Items]
Service revenues	$ 411	411	354
Cement | Operating Segments
Revenue Recognition [Line Items]
Gross Profit		334	203
Service revenues		726	620
Ready Mixed Concrete | Operating Segments
Revenue Recognition [Line Items]
Gross Profit		102	70
Service revenues		1,000	953
Ready Mixed Concrete | Operating Segments | Interproduct Revenues
Revenue Recognition [Line Items]
Service revenues		$ 217	$ 178
Minimum | Service
Revenue Recognition [Line Items]
Performance obligations, period	1 day
Maximum | Service
Revenue Recognition [Line Items]
Performance obligations, period	2 years