Consolidated Statements of Earnings and Comprehensive Earnings (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Total Revenues	$ 1,811.7	$ 1,557.3	$ 4,684.2	$ 3,917.6
Total Cost of Revenues	1,323.9	1,115.4	3,615.1	2,915.9
Gross Profit	487.8	441.9	1,069.1	1,001.7
Selling, general & administrative expenses	94.9	86.0	296.0	248.2
Acquisition and integration expenses	1.8	7.4	6.1	18.0
Other operating income, net	(14.8)	(8.4)	(177.4)	(28.2)
Earnings from Operations	405.9	356.9	944.4	763.7
Interest expense	42.8	44.3	126.4	99.9
Other nonoperating income, net	(7.3)	(5.6)	(40.1)	(23.8)
Earnings from continuing operations before income tax expense	370.4	318.2	858.1	687.6
Income tax expense	79.2	63.6	189.4	141.7
Earnings from continuing operations	291.2	254.6	668.7	545.9
Earnings from discontinued operations, net of income tax expense	4.1	0.0	14.3	0.0
Consolidated net earnings	295.3	254.6	683.0	545.9
Less: Net (loss) earnings attributable to noncontrolling interests	(0.0)	0.0	(0.2)	0.2
Net Earnings Attributable to Martin Marietta	295.3	254.6	683.2	545.7
Consolidated Comprehensive Earnings (Loss) :
Consolidated comprehensive earnings attributable to Martin Marietta	298.3	256.2	655.7	552.7
(Loss) Earnings attributable to noncontrolling interests	(0.0)	0.0	(0.2)	0.2
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 298.3	$ 256.2	$ 655.5	$ 552.9
Net Earnings Attributable to Martin Marietta Per Common Share
Basic from continuing operations attributable to common shareholders	$ 4.67	$ 4.08	$ 10.73	$ 8.74
Basic from discontinued operations attributable to common shareholders	0.07	0	0.23	0
Basic attributable to common shareholders	4.74	4.08	10.96	8.74
Diluted from continuing operations attributable to common shareholders	4.67	4.07	10.69	8.72
Diluted from discontinued operations attributable to common shareholders	0.06	0	0.23	0
Diluted attributable to common shareholders	$ 4.73	$ 4.07	$ 10.92	$ 8.72
Weighted-Average Common Shares Outstanding:
Basic	62.3	62.4	62.4	62.4
Diluted	62.5	62.6	62.5	62.6
Products and Services
Total Revenues	$ 1,680.5	$ 1,462.7	$ 4,352.1	$ 3,679.9
Total Cost of Revenues	1,193.8	1,021.0	3,281.3	2,676.9
Freight
Total Revenues	131.2	94.6	332.1	237.7
Total Cost of Revenues	$ 130.1	$ 94.4	$ 333.8	$ 239.0