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CONTINGENT LIABILITIES AND OTHER MATTERS (Details 2) (Site investigation and remediation)
Mar. 28, 2015
site
Dec. 31, 2014
site
Site investigation and remediation
    
Environmental Matters    
Number of sites 91spw_SiteContingencyNumberOfSites
/ us-gaap_EnvironmentalRemediationContingencyAxis
= us-gaap_EnvironmentalIssueMember		 91spw_SiteContingencyNumberOfSites
/ us-gaap_EnvironmentalRemediationContingencyAxis
= us-gaap_EnvironmentalIssueMember
Number of third-party disposal sites for which entity is potentially responsible 27spw_SiteContingencyNumberOfSitesOnWhichEntityPotentiallyResponsible
/ us-gaap_EnvironmentalRemediationContingencyAxis
= us-gaap_EnvironmentalIssueMember		 28spw_SiteContingencyNumberOfSitesOnWhichEntityPotentiallyResponsible
/ us-gaap_EnvironmentalRemediationContingencyAxis
= us-gaap_EnvironmentalIssueMember
Number of active sites 8spw_SiteContingencyNumberOfActiveSites
/ us-gaap_EnvironmentalRemediationContingencyAxis
= us-gaap_EnvironmentalIssueMember		 9spw_SiteContingencyNumberOfActiveSites
/ us-gaap_EnvironmentalRemediationContingencyAxis
= us-gaap_EnvironmentalIssueMember