Name:	mrno_ComplexConstructionAbstract
Namespace Prefix:	mrno_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The total number of passengers in a cruise port.

No definition available.

Name:	mrno_CruisePortCapacity
Namespace Prefix:	mrno_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The total number of rooms available in a hotel complex.

No definition available.

Name:	mrno_HotelRoomCapacity
Namespace Prefix:	mrno_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The additional total number of rooms available in a hotel complex.

No definition available.

Name:	mrno_NumberOfAdditionalRooms
Namespace Prefix:	mrno_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The total number of condominiums available in the GIC complex.

No definition available.

Name:	mrno_NumberOfCondominiums
Namespace Prefix:	mrno_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The number of hotel rooms in phase one of the Cancun complex that are expected to be converted into residential apartment units pursuant to the term sheet agreement.

No definition available.

Name:	mrno_NumberOfHotelRoomsExpectedToBeConvertedIntoResidentialApartmentUnits
Namespace Prefix:	mrno_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The total number of condominium towers under the GIC complex.

No definition available.

Name:	mrno_NumberOfTowers
Namespace Prefix:	mrno_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The total saleable area, measured in square meters, of the residential apartment units expected to result from the conversion in phase one of the Cancun complex.

No definition available.

Name:	mrno_SaleableAreaOfResidentialApartmentUnits
Namespace Prefix:	mrno_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	duration

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_SegmentsAxis=mrno_AndazAndMondrianHotelComplexMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_SegmentsAxis=mrno_ComplexInGrandIslandCancunQuintanaRooMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_SegmentsAxis=mrno_PhaseOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_SegmentsAxis=mrno_MondrianBrandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_SegmentsAxis=mrno_DreamsBrandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: