Earnings Per Share - Additional Information (Detail) shares in Millions	Sep. 30, 2015 shares
Earnings Per Share Disclosure [Line Items]
Restricted share awards excluded from the computation diluted earnings per share	6.0

Number Of Performance Based Restricted Share Awards Excluded From Diluted Earnings Per Share

No definition available.

Name:	jah_NumberOfPerformanceBasedRestrictedShareAwardsExcludedFromDilutedEarningsPerShare
Namespace Prefix:	jah_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant