The Building Materials business is comprised of divisions which represent operating segments, some of which are consolidated into reportable segments for financial reporting purposes as they meet the aggregation criteria. The Building Materials business contains three reportable segments: Mid-America Group, Southeast Group and West Group. 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-related expenses, net; other operating income and expenses, net; and exclude interest expense; other nonoperating income and expenses, net; and income tax expense (benefit). Corporate loss from operations primarily includes depreciation on capitalized interest; expenses for corporate administrative functions; acquisition-related expenses, net; and other nonrecurring and/or non-operational income and expenses excluded from the Company’s evaluation of segment performance and resource allocation. 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 and cash equivalents; property, plant and equipment for corporate operations; investments and other assets not directly identifiable with a reportable segment.

The following tables display selected financial data for the Company’s reportable segments. The acquired Bluegrass operations are reported in the Mid-America Group and Southeast Group. Total revenues, as well as the consolidated statements of earnings and comprehensive earnings, reflect the elimination of intersegment revenues.

years ended December 31 (in millions) Total revenues	2019		2018		2017
Mid-America Group	$	1,446.0	$	1,223.2	$	1,053.3
Southeast Group		506.4		423.4		362.6
West Group		2,515.4		2,310.0		2,279.7
Total Building Materials Business		4,467.8		3,956.6		3,695.6
Magnesia Specialties		271.3		287.7		270.0
Total	$	4,739.1	$	4,244.3	$	3,965.6

Gross profit
Mid-America Group	$	482.9	$	366.9	$	335.4
Southeast Group		124.1		77.2		74.6
West Group		473.6		416.2		465.6
Total Building Materials Business		1,080.6		860.3		875.6
Magnesia Specialties		95.4		98.7		89.4
Corporate		3.0		7.6		6.9
Total	$	1,179.0	$	966.6	$	971.9

Selling, general and administrative expenses
Mid-America Group	$	63.1	$	55.8	$	53.9
Southeast Group		21.6		18.7		17.1
West Group		116.3		107.6		102.7
Total Building Materials Business		201.0		182.1		173.7
Magnesia Specialties		11.3		10.0		9.5
Corporate		90.4		88.5		78.9
Total	$	302.7	$	280.6	$	262.1

years ended December 31 (in millions) Earnings (Loss) from operations	2019			2018			2017
Mid-America Group	$	425.9		$	319.1		$	284.8
Southeast Group		103.1			75.9			61.2
West Group		365.2			295.8			360.6
Total Building Materials Business		894.2			690.8			706.6
Magnesia Specialties		83.6			88.1			79.4
Corporate		(92.9	)		(88.2	)		(85.6	)
Total	$	884.9		$	690.7		$	700.4

Earnings from operations for the West Group for 2018 reflect an asset and portfolio rationalization charge of $18.8 million.

December 31 (in millions) Assets employed	2019		2018		2017
Mid-America Group	$	2,879.3	$	2,788.5	$	1,532.9
Southeast Group		1,442.5		1,299.5		616.3
West Group		5,320.7		4,989.6		5,014.2
Total Building Materials Business		9,642.5		9,077.6		7,163.4
Magnesia Specialties		176.2		156.1		152.3
Corporate		312.9		317.7		1,676.8
Total	$	10,131.6	$	9,551.4	$	8,992.5

years ended December 31 (in millions) Depreciation, depletion and amortization	2019		2018		2017
Mid-America Group	$	110.2	$	93.6	$	69.7
Southeast Group		47.8		41.2		30.8
West Group		183.3		180.9		169.8
Total Building Materials Business		341.3		315.7		270.3
Magnesia Specialties		10.2		10.4		10.1
Corporate		20.0		17.9		16.8
Total	$	371.5	$	344.0	$	297.2

Total property additions, including the impact of acquisitions
Mid-America Group	$	127.7	$	1,157.1	$	139.5
Southeast Group		45.3		603.1		34.6
West Group		182.6		148.1		240.8
Total Building Materials Business		355.6		1,908.3		414.9
Magnesia Specialties		20.0		12.5		11.1
Corporate		12.0		4.8		12.6
Total	$	387.6	$	1,925.6	$	438.6

years ended December 31 (in millions) Property additions through acquisitions	2019		2018		2017
Mid-America Group	$	—	$	980.3	$	0.1
Southeast Group		—		561.5		—
West Group		—		1.4		2.4
Total Building Materials Business		—		1,543.2		2.5
Magnesia Specialties		—		—		—
Corporate		—		—		—
Total	$	—	$	1,543.2	$	2.5