Segments - Financial Data for Continuing Operations for Company's Reportable Business Segments (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total Revenues	$ 1,251	$ 1,354
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
Assets employed	16,240	15,125	$ 15,125
Reportable segments
Segment Reporting Information [Line Items]
Earnings from Operations	1,451	224
Assets employed	12,833	13,078
Operating Segments
Segment Reporting Information [Line Items]
Earnings from Operations	1,427	204
Operating Segments | Building Materials Business East Group
Segment Reporting Information [Line Items]
Total Revenues	526	530
Earnings from Operations	128	109
Assets employed	5,198	5,131
Operating Segments | Building Materials Business West Group
Segment Reporting Information [Line Items]
Total Revenues	644	741
Earnings from Operations	1,299	95
Assets employed	7,383	7,697
Operating Segments | Building Materials Business
Segment Reporting Information [Line Items]
Total Revenues	1,170	1,271
Assets employed	12,581	12,828
Operating Segments | Magnesia Specialties
Segment Reporting Information [Line Items]
Total Revenues	81	83
Earnings from Operations	24	20
Assets employed	252	250
Corporate
Segment Reporting Information [Line Items]
Earnings from Operations	(30)	(28)
Assets employed	$ 3,407	$ 2,047