Segments (Tables)

3 Months Ended

Mar. 31, 2023

Segment Reporting [Abstract]

Financial Data for Continuing Operation for Company's Reportable Business Segments

The following table displays selected financial data for the Company’s reportable segments. Total revenues, as presented on the consolidated statements of earnings and comprehensive earnings, reflect the elimination of intersegment revenues, which represent sales from one segment to another segment. Total revenues and earnings (loss) from operations reflect continuing operations only.

	Three Months Ended
	March 31,
	2023			2022
	(Dollars in Millions)
Total revenues:
East Group	$	529.6		$	418.8
West Group		741.1			735.0
Total Building Materials business		1,270.7			1,153.8
Magnesia Specialties		83.4			77.0
Total	$	1,354.1		$	1,230.8
Earnings (Loss) from operations:
East Group	$	108.9		$	28.0
West Group		94.7			43.0
Total Building Materials business		203.6			71.0
Magnesia Specialties		20.6			21.5
Corporate		(28.1	)		(32.6	)
Total	$	196.1		$	59.9