COMMITMENTS AND CONTINGENCIES (Details 2) (Australian JV)	3 Months Ended
Mar. 31, 2014
Australian JV
Joint venture put and call options
Percentage of purchase price to be paid immediately if the Parent is public and the put option is exercised	50.00%
Period within which the remaining balance is to be paid if the parent is public and the put option is exercised	18 months

Represents the period within which the remaining balance is to be paid if the parent is public and the put option is exercised.

No definition available.

Name:	mc_EquityMethodInvestmentsPeriodWithinWhichRemainingBalanceIsToBePaidIfParentIsPublicAndPutOptionIsExercised
Namespace Prefix:	mc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration