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