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Commitments and Contingencies - Range of Environmental Liability and Number of Active Sites for Environmental Matters (Detail) (Environmental Related Matters [Member], USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
site
Dec. 31, 2013
site
Environmental Related Matters [Member]
    
Environmental Matters Range Of Estimated Liability And Active Sites Numbers [Line Items]    
High end range $ 160.3us-gaap_LossContingencyRangeOfPossibleLossMaximum
/ us-gaap_PlanNameAxis
= itt_EnvironmentalRelatedMattersMember		 $ 168.0us-gaap_LossContingencyRangeOfPossibleLossMaximum
/ us-gaap_PlanNameAxis
= itt_EnvironmentalRelatedMattersMember
Number of active environmental investigation and remediation sites 54itt_NumberOfActiveEnvironmentalInvestigationAndRemediationSites
/ us-gaap_PlanNameAxis
= itt_EnvironmentalRelatedMattersMember		 60itt_NumberOfActiveEnvironmentalInvestigationAndRemediationSites
/ us-gaap_PlanNameAxis
= itt_EnvironmentalRelatedMattersMember