As of December 31, 2022, the Building Materials business is comprised of four divisions that represent individual operating segments. These operating segments are consolidated into two reportable segments, the East Group and the West Group, for financial reporting purposes as they meet the aggregation criteria. The Magnesia Specialties business represents an individual operating and reportable segment. The accounting policies used for segment reporting are the same as those described in Note A.

The Chief Operating Decision Maker’s evaluation of performance and allocation of resources are based primarily on earnings from operations. Consolidated earnings from operations include total revenues less cost of revenues; selling, general and administrative expenses; acquisition and integration expenses; other operating income and expenses, net; and exclude interest expense; other nonoperating income and expenses, net; and income tax expense. Corporate loss from operations primarily includes depreciation; expenses for corporate administrative functions; acquisition and integration expenses; and other nonrecurring income and expenses not attributable to operations of the Company's other operating segments. All long-term debt and related interest expense are held at Corporate.

Assets employed by segment include assets directly identified with those operations. Corporate assets consist primarily of cash, cash equivalents and restricted cash; property, plant and equipment for corporate operations; restricted investments; and other assets not directly identifiable with a reportable segment.

The following tables display 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. Total revenues and earnings (loss) from operations reflect continuing operations only.


years ended December 31 (in millions) Total revenues	2022		2021		2020
East Group	$	2,468.1	$	2,303.0	$	1,949.1
West Group		3,388.6		2,812.3		2,538.1
Total Building Materials business		5,856.7		5,115.3		4,487.2
Magnesia Specialties		304.0		298.7		242.7
Total	$	6,160.7	$	5,414.0	$	4,729.9


years ended December 31 (in millions) Earnings (Loss) from operations	2022			2021			2020
East Group	$	640.2		$	621.7		$	522.1
West Group		588.1			385.2			471.3
Total Building Materials business		1,228.3			1,006.9			993.4
Magnesia Specialties		75.2			90.8			70.7
Corporate		(96.8	)		(123.9	)		(58.7	)
Total	$	1,206.7		$	973.8		$	1,005.4

Earnings from operations for the West Group included a nonrecurring gain on divestiture of $151.9 million in 2022 and nonrecurring gains on sales of investment land and divested assets of $69.9 million in 2020.


December 31 (in millions) Assets employed	2022		2021		2020
East Group	$	5,063.5	$	5,009.0	$	4,342.5
West Group		7,908.4		8,264.8		5,355.5
Total Building Materials business		12,971.9		13,273.8		9,698.0
Magnesia Specialties		192.1		168.7		167.9
Corporate		1,829.6		950.5		714.9
Total	$	14,993.6	$	14,393.0	$	10,580.8


years ended December 31 (in millions) Depreciation, depletion and amortization	2022		2021		2020
East Group	$	210.4	$	196.0	$	167.9
West Group		260.6		223.0		196.6
Total Building Materials business		471.0		419.0		364.5
Magnesia Specialties		12.2		12.3		11.5
Corporate		22.8		20.4		17.5
Total	$	506.0	$	451.7	$	393.5


Total property additions, including the impact of acquisitions
East Group	$	189.1	$	372.9	$	159.0
West Group		302.2		1,131.6		197.9
Total Building Materials business		491.3		1,504.5		356.9
Magnesia Specialties		32.0		8.2		13.5
Corporate		21.1		28.8		16.8
Total	$	544.4	$	1,541.5	$	387.2


Property additions through acquisitions
East Group	$	—	$	169.2	$	—
West Group		2.5		918.3		20.0
Total Building Materials business		2.5		1,087.5		20.0
Magnesia Specialties		—		—		—
Corporate		—		—		—
Total	$	2.5	$	1,087.5	$	20.0