| Line | Roll Up Total Concept | Roll Up Items Concept | Count |
|---|---|---|---|
| 1 | mlm:AccountsAndOtherReceivablesGrossCurrent | us-gaap:OtherReceivablesGrossCurrent | 1 |
| 2 | mlm:AccountsAndOtherReceivablesGrossCurrent | us-gaap:AccountsReceivableGrossCurrent | 1 |
(Note that this is a work in progress!)