The Building Materials business contains two reportable segments: the East Group and the West Group. The Company also has a Magnesia Specialties reportable segment. The Chief Operating Decision Maker's evaluation of performance and allocation of resources are based primarily on earnings from operations. Segment earnings from operations include total revenues less cost of revenues; selling, general and administrative expenses; other operating income and expenses, net; and exclude interest income and expense; other nonoperating income and expenses, net; and income tax expense. Corporate loss from operations primarily includes depreciation; expenses for corporate administrative functions; acquisition, divestiture and integration expenses; and other nonrecurring income and expenses not attributable to operations of the Company's operating segments.

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

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,
	2024			2023
	(Dollars in Millions)
Total revenues:
East Group	$	526		$	530
West Group		644			741
Total Building Materials business		1,170			1,271
Magnesia Specialties		81			83
Total	$	1,251		$	1,354

Earnings (Loss) from operations:
East Group	$	128		$	109
West Group		1,299			95
Total Building Materials business		1,427			204
Magnesia Specialties		24			20
Total reportable segments		1,451			224
Corporate		(30	)		(28	)
Consolidated earnings from operations		1,421			196
Interest expense		40			42
Other nonoperating income, net		(33	)		(17	)
Consolidated earnings from continuing operations before income tax expense	$	1,414		$	171

Earnings from operations for the West Group for 2024 included a $1.3 billion gain on the divestiture of the South Texas cement business and certain of its related ready mixed concrete operations and a noncash asset and portfolio rationalization charge of $49 million.


	March 31,		December 31,
	2024		2023
	(Dollars in Millions)
Assets employed:
East Group	$	5,198	$	5,131
West Group		7,383		7,697
Total Building Materials business		12,581		12,828
Magnesia Specialties		252		250
Total reportable segments		12,833		13,078
Corporate		3,407		2,047
Total	$	16,240	$	15,125

The increase in Corporate assets employed as of March 31, 2024, as compared to December 31, 2023, reflects net cash proceeds from acquisitions and divestitures that closed during the first quarter.