Segments - Schedule of Consolidated Earnings from Continuing Operations Before Income Tax Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Segment Revenues	$ 6,536	$ 6,777	$ 6,161
Labor and benefits expense	833	824	803
Raw materials expense	580	682	713
Depreciation, depletion and amortization expense	531	482	475
Energy expense	323	405	500
External freight expense	359	376	433
Other costs of revenues	2,032	1,985	1,814
Selling, general and administrative expenses	447	443	397
Acquisition, divestiture and integration expenses	50	12	9
Other operating expense (income), net	(1,326)	(28)	(190)
Segment Earnings (Loss) from Operations	2,707	1,596	1,207
Interest expense	169	165	169
Other nonoperating income, net	(58)	(62)	(53)
Earnings from continuing operations before income tax expense	2,596	1,493	1,091
Operating Segments | East Group
Segment Reporting Information [Line Items]
Segment Revenues	2,941	2,763	2,468
Labor and benefits expense	391	362	340
Raw materials expense	96	104	118
Depreciation, depletion and amortization expense	259	205	205
Energy expense	145	152	175
External freight expense	108	113	143
Other costs of revenues	905	854	740
Selling, general and administrative expenses	139	124	115
Acquisition, divestiture and integration expenses	0	0	0
Other operating expense (income), net	7	(8)	(8)
Segment Earnings (Loss) from Operations	891	857	640
Operating Segments | West Group
Segment Reporting Information [Line Items]
Segment Revenues	3,275	3,699	3,389
Labor and benefits expense	402	433	428
Raw materials expense	466	556	568
Depreciation, depletion and amortization expense	254	261	255
Energy expense	147	216	280
External freight expense	220	233	259
Other costs of revenues	1,013	1,050	1,008
Selling, general and administrative expenses	187	177	166
Acquisition, divestiture and integration expenses	16	6	0
Other operating expense (income), net	(1,307)	(10)	(164)
Segment Earnings (Loss) from Operations	1,877	777	589
Operating Segments | Magnesia Specialties
Segment Reporting Information [Line Items]
Segment Revenues	320	315	304
Labor and benefits expense	39	36	35
Raw materials expense	18	22	27
Depreciation, depletion and amortization expense	15	13	12
Energy expense	31	37	45
External freight expense	31	30	31
Other costs of revenues	79	80	63
Selling, general and administrative expenses	20	18	16
Acquisition, divestiture and integration expenses	0	0	0
Other operating expense (income), net	(3)	3	(1)
Segment Earnings (Loss) from Operations	90	76	76
Operating Segments | Reportable Segments
Segment Reporting Information [Line Items]
Segment Revenues	6,536	6,777	6,161
Labor and benefits expense	832	831	803
Raw materials expense	580	682	713
Depreciation, depletion and amortization expense	528	479	472
Energy expense	323	405	500
External freight expense	359	376	433
Other costs of revenues	1,997	1,984	1,811
Selling, general and administrative expenses	346	319	297
Acquisition, divestiture and integration expenses	16	6	0
Other operating expense (income), net	(1,303)	(15)	(173)
Segment Earnings (Loss) from Operations	2,858	1,710	1,305
Corporate
Segment Reporting Information [Line Items]
Segment Revenues	0	0	0
Labor and benefits expense	1	(7)	0
Raw materials expense	0	0	0
Depreciation, depletion and amortization expense	3	3	3
Energy expense	0	0	0
External freight expense	0	0	0
Other costs of revenues	35	1	3
Selling, general and administrative expenses	101	124	100
Acquisition, divestiture and integration expenses	34	6	9
Other operating expense (income), net	(23)	(13)	(17)
Segment Earnings (Loss) from Operations	$ (151)	$ (114)	$ (98)