Consolidated Statements of Earnings and Comprehensive Earnings (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Total Revenues	$ 1,641.7	$ 1,377.9	$ 2,872.5	$ 2,360.3
Total Cost of Revenues	1,216.5	992.8	2,291.2	1,800.5
Gross Profit	425.2	385.1	581.3	559.8
Selling, general & administrative expenses	104.1	82.4	201.2	162.2
Acquisition and integration expenses	2.9	9.3	4.3	10.6
Other operating income, net	(160.4)	(14.1)	(162.6)	(19.8)
Earnings from Operations	478.6	307.5	538.4	406.8
Interest expense	43.1	28.1	83.6	55.6
Other nonoperating income, net	(22.0)	(8.7)	(32.9)	(18.2)
Earnings from continuing operations before income tax expense	457.5	288.1	487.7	369.4
Income tax expense	104.4	62.3	110.2	78.1
Earnings from continuing operations	353.1	225.8	377.5	291.3
Earnings from discontinued operations, net of income tax expense	13.3	0.0	10.2	0.0
Consolidated net earnings	366.4	225.8	387.7	291.3
Less: Net (loss) earnings attributable to noncontrolling interests	(0.1)	0.0	(0.2)	0.2
Net Earnings Attributable to Martin Marietta Materials, Inc.	366.5	225.8	387.9	291.1
Consolidated Comprehensive Earnings (Loss) :
Earnings attributable to Martin Marietta Materials, Inc.	367.7	228.4	357.4	296.5
(Loss) Earnings attributable to noncontrolling interests	(0.1)	0.0	(0.2)	0.2
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 367.6	$ 228.4	$ 357.2	$ 296.7
Net Earnings Attributable to Martin Marietta Materials, Inc. Per Common Share
Basic from continuing operations attributable to common shareholders	$ 5.66	$ 3.62	$ 6.06	$ 4.66
Basic from discontinued operations attributable to common shareholders	0.21	0	0.16	0
Basic attributable to common shareholders	5.87	3.62	6.22	4.66
Diluted from continuing operations attributable to common shareholders	5.65	3.61	6.04	4.65
Diluted from discontinued operations attributable to common shareholders	0.21	0	0.16	0
Diluted attributable to common shareholders	$ 5.86	$ 3.61	$ 6.20	$ 4.65
Weighted-Average Common Shares Outstanding:
Basic	62.4	62.4	62.4	62.4
Diluted	62.5	62.5	62.6	62.5
Products and Services
Total Revenues	$ 1,523.8	$ 1,295.3	$ 2,671.6	$ 2,217.2
Total Cost of Revenues	1,095.6	910.0	2,087.5	1,656.0
Freight
Total Revenues	117.9	82.6	200.9	143.1
Total Cost of Revenues	$ 120.9	$ 82.8	$ 203.7	$ 144.5