Stock-Based Compensation - Stock-Based Compensation Expense in Future for Outstanding Awards (Detail) $ in Millions	12 Months Ended
Dec. 31, 2022 USD ($)
Share-Based Payment Arrangement [Abstract]
2023	$ 26.1
2024	12.8
2025	2.2
2026	1.1
2027	0.2
Total	$ 42.4

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