Financial Instruments of the Trading Companies (Details)	9 Months Ended
Sep. 30, 2013 Contract
Financial Instruments of the Trading Companies [Abstract]
Number of characteristics of derivatives	3
Number of underlying instruments	1
Number of notional amount	1

Represents number of characteristics of derivative instrument as a financial instrument or other contract.

No definition available.

Name:	mflv_NumberOfCharacteristicsOfDerivatives
Namespace Prefix:	mflv_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration