Consolidated Statements of Earnings and Comprehensive Earnings (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Income Statement [Abstract]
Revenues	$ 1,353	$ 1,251
Cost of revenues	1,018	979
Gross Profit	335	272
Selling, general and administrative expenses	130	118
Acquisition, divestiture and integration expenses	2	20
Other operating expense (income), net	9	(1,287)
Earnings from Operations	194	1,421
Interest expense	56	40
Other nonoperating income, net	(10)	(33)
Earnings before income tax expense	148	1,414
Income tax expense	32	368
Consolidated net earnings	116	1,046
Less: Net earnings attributable to noncontrolling interests	0	1
Net Earnings Attributable to Martin Marietta	116	1,045
Consolidated Comprehensive Earnings:
Consolidated comprehensive earnings attributable to Martin Marietta	117	1,045
Comprehensive earnings attributable to noncontrolling interests	0	1
Consolidated comprehensive earnings	$ 117	$ 1,046
Net Earnings Attributable to Martin Marietta Per Common Share:
Basic attributable to common shareholders	$ 1.91	$ 16.92
Diluted attributable to common shareholders	$ 1.9	$ 16.87
Weighted-Average Common Shares Outstanding:
Basic	60.9	61.8
Diluted	61.0	62.0