Financial Instruments of the Trading Companies (Details)	12 Months Ended
Dec. 31, 2014 Contract Characteristic
Financial Instruments of the Trading Companies [Abstract]
Number of characteristics of derivatives	3
Minimum number of underlying instruments	1
Minimum number of notional amount	1mflv_MinimumNumberOfNotionalAmount

Refers to the minimum number of securities, commodities, or other assets described in a derivative contract.

No definition available.

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