CONTINGENCIES (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013 Proceeding	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract]
Administrative penalty (China)	$ 33.4	$ 0	$ 0
Minimum number of proceedings that could have a material impact	1

The minimum number of proceedings that could have a material adverse affect on the Company's results of operations for the periods in which a loss is recognized.

No definition available.

Name:	mjn_LossContingencyNumberOfProceedingsThatCouldHaveMaterialAdverseAffectMinimum
Namespace Prefix:	mjn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant