Significant Accounting Policies - Comprehensive Earnings Attributable to Martin Marietta Materials Incorporated (Detail) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 1,045	$ 121
Other comprehensive earnings, net of tax	0	1
Consolidated comprehensive earnings attributable to Martin Marietta	$ 1,045	$ 122

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details