Consolidated Statements of Earnings and Comprehensive Earnings (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Revenues	$ 1,889	$ 1,994	$ 4,905	$ 5,169
Cost of revenues	1,290	1,318	3,517	3,630
Gross Profit	599	676	1,388	1,539
Selling, general and administrative expenses	105	108	341	324
Acquisition, divestiture and integration expenses	4	3	44	5
Other operating expense (income), net	1	(2)	(1,305)	(16)
Earnings from Operations	489	567	2,308	1,226
Interest expense	38	41	119	125
Other nonoperating income, net	(7)	(14)	(54)	(49)
Earnings from continuing operations before income tax expense	458	540	2,243	1,150
Income tax expense	95	110	541	237
Earnings from continuing operations	363	430	1,702	913
Loss from discontinued operations, net of income tax benefit	0	(13)	0	(26)
Consolidated net earnings	363	417	1,702	887
Less: Net earnings attributable to noncontrolling interests	0	0	1	1
Net Earnings Attributable to Martin Marietta	363	417	1,701	886
Consolidated Comprehensive Earnings:
Earnings attributable to Martin Marietta	365	417	1,704	889
Earnings attributable to noncontrolling interests	0	0	1	1
Consolidated comprehensive earnings	$ 365	$ 417	$ 1,705	$ 890
Net Earnings (Loss) Attributable to Martin Marietta Per Common Share:
Basic earnings per share from continuing operations attributable to common shareholders	$ 5.93	$ 6.96	$ 27.68	$ 14.73
Basic loss per share from discontinued operations attributable to common shareholders	0	(0.22)	0	(0.42)
Basic attributable to common shareholders	5.93	6.74	27.68	14.31
Diluted earnings per share from continuing operations attributable to common shareholders	5.91	6.94	27.6	14.69
Diluted loss per share from discontinued operations attributable to common shareholders	0	(0.22)	0	(0.42)
Diluted attributable to common shareholders	$ 5.91	$ 6.72	$ 27.6	$ 14.27
Weighted-Average Common Shares Outstanding:
Basic	61.1	61.8	61.5	61.9
Diluted	61.3	62.0	61.6	62.1