Revenues and Gross Profit (Tables)

3 Months Ended

Mar. 31, 2023

Revenues And Gross Profit [Abstract]

Summary of Information About the Company's Contract Balances

The following table presents information about the Company’s contract balances:

	March 31, 2023		December 31, 2022
	(Dollars in Millions)
Costs in excess of billings	$	4.9	$	5.1
Billings in excess of costs	$	7.5	$	10.5

Total Revenues and Gross Profit (Loss) by Product Line

The following table, which is reconciled to consolidated amounts, provides total revenues and gross profit (loss) by line of business: Building Materials (further divided by product line) and Magnesia Specialties. Interproduct revenues represent sales from the aggregates product line to the ready mixed concrete and asphalt and paving product lines and sales from the cement product line to the ready mixed concrete product line. Total revenues and gross profit (loss) reflect continuing operations only.

	Three Months Ended
	March 31,
	2023			2022
	(Dollars in Millions)
Total revenues:
Building Materials business:
Aggregates	$	911.9		$	756.6
Cement		168.6			138.3
Ready mixed concrete		220.0			291.1
Asphalt and paving services		58.0			56.8
Less: interproduct revenues		(87.8	)		(89.0	)
Total Building Materials business		1,270.7			1,153.8
Magnesia Specialties		83.4			77.0
Total	$	1,354.1		$	1,230.8
Gross profit (loss):
Building Materials business:
Aggregates	$	238.1		$	102.8
Cement		47.1			26.9
Ready mixed concrete		11.2			21.9
Asphalt and paving services		(20.5	)		(13.2	)
Total Building Materials business		275.9			138.4
Magnesia Specialties		25.0			25.6
Corporate		1.9			(7.9	)
Total	$	302.8		$	156.1