Consolidated Statements of Earnings and Comprehensive Earnings (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Total Revenues	$ 1,354.1	$ 1,230.8
Total Cost of Revenues	1,051.3	1,074.7
Gross Profit	302.8	156.1
Selling, general and administrative expenses	104.3	97.1
Acquisition and integration expenses	0.8	1.4
Other operating expense (income), net	1.6	(2.3)
Earnings from Operations	196.1	59.9
Interest expense	42.2	40.5
Other nonoperating income, net	(16.1)	(10.8)
Earnings from continuing operations before income tax expense	170.0	30.2
Income tax expense	35.5	5.8
Earnings from continuing operations	134.5	24.4
Loss from discontinued operations, net of income tax benefit	(12.9)	(3.1)
Consolidated net earnings	121.6	21.3
Less: Net earnings (loss) attributable to noncontrolling interests	0.2	(0.1)
Net Earnings Attributable to Martin Marietta	121.4	21.4
Consolidated Comprehensive Earnings (Loss) :
Consolidated comprehensive earnings (loss) attributable to Martin Marietta	122.5	(10.2)
Earnings (Loss) attributable to noncontrolling interests	0.2	(0.1)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 122.7	$ (10.3)
Net Earnings (Loss) Attributable to Martin Marietta Per Common Share:
Basic from continuing operations attributable to common shareholders	$ 2.17	$ 0.39
Basic from discontinued operations attributable to common shareholders	(0.21)	(0.05)
Basic attributable to common shareholders	1.96	0.34
Diluted from continuing operations attributable to common shareholders	2.16	0.39
Diluted from discontinued operations attributable to common shareholders	(0.21)	(0.05)
Diluted attributable to common shareholders	$ 1.95	$ 0.34
Weighted-Average Common Shares Outstanding:
Basic	62.1	62.4
Diluted	62.2	62.6