Significant Accounting Policies - Additional Information (Detail) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023 USD ($) State Plant	Sep. 30, 2022 Plant	Sep. 30, 2023 USD ($) Segment Plant Facility State	Sep. 30, 2022 USD ($) Plant	Dec. 31, 2022 USD ($)
Significant Accounting Policies [Line Items]
Number of quarries and yards | Facility			350
Number of states in which entity operates | State	28		28
Reportable business segments | Segment			2
Restricted cash	$ 0.0		$ 0.0		$ 0.8
Number of days restricted from utilizing cash					180 days
Restricted investments			0.0	$ 704.6
Restricted investments	$ 0.0		$ 0.0		$ 704.6
0.650% Senior Notes, Due 2023 (discharged)
Significant Accounting Policies [Line Items]
Debt instrument, face amount					$ 700.0
Interest rate on notes	0.65%		0.65%		0.65%
Maturity year			2023		2023
Pension and Postretirement Benefit Plans
Significant Accounting Policies [Line Items]
Other comprehensive loss, before reclassifications, net of tax			$ (0.2)	$ 33.0
California
Significant Accounting Policies [Line Items]
Number of cement plants | Plant	1	1	1	1