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COMMITMENTS AND CONTINGENCIES Roll Forward of Asbestos Liability and Related Assets (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Net Asbestos Liability Rollforward [Line Items]      
Asbestos Liability And Related Assets Net Current And Noncurrent - Beginning $ 746.8itt_AsbestosLiabilityAndRelatedAssetsNetCurrentAndNoncurrent    
Asbestos-related costs, net 15.4itt_AsbestosRelatedCostsNet 15.8itt_AsbestosRelatedCostsNet  
Increase Decrease Net Cash Activity 3.9itt_IncreaseDecreaseNetCashActivity    
Asbestos Liability And Related Assets Net Current And Noncurrent - Ending 758.3itt_AsbestosLiabilityAndRelatedAssetsNetCurrentAndNoncurrent    
Asbestos-related liabilities 1,120.7us-gaap_LossContingencyAccrualCarryingValueNoncurrent   1,116.6us-gaap_LossContingencyAccrualCarryingValueNoncurrent
Liability [Member]      
Net Asbestos Liability Rollforward [Line Items]      
Asbestos Liability And Related Assets Net Current And Noncurrent - Beginning 1,223.2itt_AsbestosLiabilityAndRelatedAssetsNetCurrentAndNoncurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_LiabilityMember
   
Asbestos Provision For Liability And Related Assets Net (18.1)itt_AsbestosRelatedCostsBenefitProvisiontoMaintain10YearForecastPeriod
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_LiabilityMember
   
Increase Decrease Net Cash Activity 14.9itt_IncreaseDecreaseNetCashActivity
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_LiabilityMember
   
Asbestos Liability And Related Assets Net Current And Noncurrent - Ending 1,226.4itt_AsbestosLiabilityAndRelatedAssetsNetCurrentAndNoncurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_LiabilityMember
   
Loss Contingency, Accrual, Current (105.7)us-gaap_LossContingencyAccrualCarryingValueCurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_LiabilityMember
   
Asbestos-related liabilities 1,120.7us-gaap_LossContingencyAccrualCarryingValueNoncurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_LiabilityMember
   
Asset [Member]      
Net Asbestos Liability Rollforward [Line Items]      
Asbestos Liability And Related Assets Net Current And Noncurrent - Beginning 476.4itt_AsbestosLiabilityAndRelatedAssetsNetCurrentAndNoncurrent
/ us-gaap_BalanceSheetLocationAxis
= itt_AssetMember
   
Asbestos Provision For Liability And Related Assets Net 2.7itt_AsbestosRelatedCostsBenefitProvisiontoMaintain10YearForecastPeriod
/ us-gaap_BalanceSheetLocationAxis
= itt_AssetMember
   
Increase Decrease Net Cash Activity (11.0)itt_IncreaseDecreaseNetCashActivity
/ us-gaap_BalanceSheetLocationAxis
= itt_AssetMember
   
Asbestos Liability And Related Assets Net Current And Noncurrent - Ending 468.1itt_AsbestosLiabilityAndRelatedAssetsNetCurrentAndNoncurrent
/ us-gaap_BalanceSheetLocationAxis
= itt_AssetMember
   
Loss Contingency, Accrual, Current 102.3us-gaap_LossContingencyAccrualCarryingValueCurrent
/ us-gaap_BalanceSheetLocationAxis
= itt_AssetMember
   
Asbestos-related liabilities $ 365.8us-gaap_LossContingencyAccrualCarryingValueNoncurrent
/ us-gaap_BalanceSheetLocationAxis
= itt_AssetMember