Stock-Based Compensation - Stock-Based Compensation Expense in Future for Outstanding Awards (Detail) $ in Millions	12 Months Ended
Dec. 31, 2023 USD ($)
Share-Based Payment Arrangement [Abstract]
2024	$ 28.2
2025	9.1
2026	1.8
2027	0.7
2028	0.1
Total	$ 39.9

Future share-based compensation expense year three.

No definition available.

Name:	mlm_FutureShareBasedCompensationExpenseYearThree
Namespace Prefix:	mlm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration