Segments (Tables)

6 Months Ended

Jun. 30, 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. In 2022, earnings from operations for the West Group included a nonrecurring gain on divested assets of $151.7 million.

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2023			2022			2023			2022
	(Dollars in Millions)
Total revenues:
East Group	$	735.1		$	674.5		$	1,264.7		$	1,093.3
West Group		1,005.2			885.5			1,746.3			1,620.5
Total Building Materials business		1,740.3			1,560.0			3,011.0			2,713.8
Magnesia Specialties		80.5			81.7			163.9			158.7
Total	$	1,820.8		$	1,641.7		$	3,174.9		$	2,872.5
Earnings (Loss) from operations:
East Group	$	227.5		$	210.6		$	336.4		$	238.5
West Group		239.6			274.5			334.3			317.6
Total Building Materials business		467.1			485.1			670.7			556.1
Magnesia Specialties		23.3			20.3			43.9			41.8
Corporate		(27.1	)		(26.8	)		(55.3	)		(59.5	)
Total	$	463.3		$	478.6		$	659.3		$	538.4