Stock-Based Compensation - Stock-Based Compensation Expense in Future for Outstanding Awards (Detail) $ in Millions	12 Months Ended
Dec. 31, 2024 USD ($)
Share-Based Payment Arrangement [Abstract]
2025	$ 19
2026	8
2027	1
2028	1
Total	$ 29

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