Consolidated Statements of Earnings - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Total Revenues	$ 6,777.2	$ 6,160.7	$ 5,414.0
Total cost of revenues	4,754.6	4,737.4	4,065.6
Gross Profit	2,022.6	1,423.3	1,348.4
Selling, general and administrative expenses	442.8	396.7	351.0
Acquisition, divestiture and integration expenses	12.2	9.1	57.9
Other operating income, net	(28.4)	(189.2)	(34.3)
Earnings from Operations	1,596.0	1,206.7	973.8
Interest expense	165.3	169.0	142.7
Other nonoperating income, net	(62.1)	(53.4)	(24.4)
Consolidated earnings from continuing operations before income tax expense	1,492.8	1,091.1	855.5
Income tax expense	292.5	234.8	153.2
Earnings from continuing operations	1,200.3	856.3	702.3
(Loss) Earnings from discontinued operations, net of income tax (benefit) expense	(30.9)	10.5	0.5
Consolidated net earnings	1,169.4	866.8	702.8
Less: Net earnings attributable to noncontrolling interests	0.5	0.0	0.3
Net Earnings Attributable to Martin Marietta	$ 1,168.9	$ 866.8	$ 702.5
Net Earnings (Loss) Attributable to Martin Marietta Per Common Share (see Note A)
Basic earnings per share from continuing operations attributable to common shareholders	$ 19.38	$ 13.74	$ 11.25
Basic earnings per share from discontinued operations attributable to common shareholders	(0.5)	0.17	0.01
Basic attributable to common shareholders	18.88	13.91	11.26
Diluted earnings per share from continuing operations attributable to common shareholders	19.32	13.7	11.21
Diluted earnings per share from discontinued operations attributable to common shareholders	(0.5)	0.17	0.01
Diluted attributable to common shareholders	$ 18.82	$ 13.87	$ 11.22
Weighted-Average Common Shares Outstanding
Basic	61.9	62.3	62.4
Diluted	62.1	62.5	62.6