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Business Combinations, Divestitures, Discontinued Operations and Assets and Liabilities Held for Sale - Additional Information (Detail) Tons in Millions, $ in Millions				3 Months Ended		9 Months Ended
	Apr. 05, 2024 USD ($) Facility	Feb. 09, 2024 USD ($) Plant	Jan. 12, 2024	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Oct. 31, 2025 Tons
Business Acquisition [Line Items]
Revenues				$ 1,846	$ 1,642	$ 4,617	$ 4,250
Pretax earnings				$ 505	406	$ 1,096	2,140
Business combination periods for production level			60 years
Revenues		$ 2,100
Divestitures number of south texas ready mix operations \| Plant		20
Pretax gain							1,300
Quikrete [Member] \| Subsequent Event [Member]
Business Acquisition [Line Items]
Production capacity of aggregate operations \| Tons								20
Blue Water Industries LLC
Business Acquisition [Line Items]
Revenues					85		182
Pretax earnings					$ 13		25
Number of active aggregates operations \| Facility	20
Payments to acquire businesses gross	$ 2,050
Charges for selling acquired inventory							$ 20