Consolidated Statements of Earnings and Comprehensive Earnings (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues	$ 1,764	$ 1,821	$ 3,015	$ 3,175
Cost of revenues	1,247	1,261	2,225	2,312
Gross Profit	517	560	790	863
Selling, general and administrative expenses	117	112	236	216
Acquisition, divestiture and integration expenses	21	0	41	1
Other operating income, net	(19)	(15)	(1,306)	(13)
Earnings from Operations	398	463	1,819	659
Interest expense	40	42	80	84
Other nonoperating income, net	(14)	(19)	(46)	(35)
Earnings from continuing operations before income tax expense	372	440	1,785	610
Income tax expense	78	92	445	128
Earnings from continuing operations	294	348	1,340	482
Earnings (Loss) from discontinued operations, net of income tax expense (benefit)	0	1	0	(12)
Consolidated net earnings	294	349	1,340	470
Less: Net earnings attributable to noncontrolling interests	0	1	1	1
Net Earnings Attributable to Martin Marietta	294	348	1,339	469
Consolidated Comprehensive Earnings (Loss) :
Earnings attributable to Martin Marietta	295	350	1,340	472
Earnings attributable to noncontrolling interests	0	1	1	1
Consolidated comprehensive earnings	$ 295	$ 351	$ 1,341	$ 473
Net Earnings (Loss) Attributable to Martin Marietta Per Common Share:
Basic earnings per share from continuing operations attributable to common shareholders	$ 4.77	$ 5.61	$ 21.72	$ 7.78
Basic earnings (loss) per share from discontinued operations attributable to common shareholders	0	0.01	0	(0.2)
Basic attributable to common shareholders	4.77	5.62	21.72	7.58
Diluted earnings per share from continuing operations attributable to common shareholders	4.76	5.6	21.66	7.76
Diluted earnings (loss) per share from discontinued operations attributable to common shareholders	0	0.01	0	(0.2)
Diluted attributable to common shareholders	$ 4.76	$ 5.61	$ 21.66	$ 7.56
Weighted-Average Common Shares Outstanding:
Basic	61.5	61.9	61.6	62.0
Diluted	61.6	62.1	61.8	62.2