Business Segments (Tables)

9 Months Ended

Sep. 30, 2022

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, exclude intersegment revenues, which represent sales from one segment to another segment and are eliminated in consolidation. Total revenues, product and services revenues, and earnings (loss) from operations reflect continuing operations only. For the nine months ended September 30, 2022, earnings from operations for the West Group include a nonrecurring gain on a divestiture of $151.9 million.

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2022			2021			2022			2021
	(Dollars in Millions)
Total revenues:
East Group	$	773.6		$	684.1		$	1,866.9		$	1,714.4
West Group		962.4			794.8			2,582.9			1,978.2
Total Building Materials business		1,736.0			1,478.9			4,449.8			3,692.6
Magnesia Specialties		75.7			78.4			234.4			225.0
Total	$	1,811.7		$	1,557.3		$	4,684.2		$	3,917.6
Products and services revenues:
East Group	$	728.5		$	641.8		$	1,755.5		$	1,610.9
West Group		883.0			749.0			2,382.2			1,861.9
Total Building Materials business		1,611.5			1,390.8			4,137.7			3,472.8
Magnesia Specialties		69.0			71.9			214.4			207.1
Total	$	1,680.5		$	1,462.7		$	4,352.1		$	3,679.9
Earnings (Loss) from operations:
East Group	$	239.4		$	205.8		$	478.0		$	465.3
West Group		159.7			150.6			477.2			284.2
Total Building Materials business		399.1			356.4			955.2			749.5
Magnesia Specialties		16.5			23.1			58.4			69.8
Corporate		(9.7	)		(22.6	)		(69.2	)		(55.6	)
Total	$	405.9		$	356.9		$	944.4		$	763.7