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Commitments and Contingencies - Rollforward of Environmental Liability and Related Assets (Detail) (Environmental Related Matters [Member], USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Environmental Liability and Related Assets [Roll Forward] |  |  |  |
Environmental liability - Beginning balance | $ 82.9 us-gaap_AccrualForEnvironmentalLossContingencies |  | $ 83.8 us-gaap_AccrualForEnvironmentalLossContingencies |
Environmental liability - Ending balance | 82.2 us-gaap_AccrualForEnvironmentalLossContingencies |  | 82.9 us-gaap_AccrualForEnvironmentalLossContingencies |
Accruals added during the period for new matters, Net | 0.1 itt_EstimatedEnvironmentalRelatedAssetsOrAccrualsAcquiredNet |  | 0.5 itt_EstimatedEnvironmentalRelatedAssetsOrAccrualsAcquiredNet |
Net cash activity, Net | (12.3)itt_EstimatedEnvironmentalRelatedOrAccrualAssetsPaymentNet |  | (11.6)itt_EstimatedEnvironmentalRelatedOrAccrualAssetsPaymentNet |
Accruals added during the period for new matters, Net | (0.5)us-gaap_AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForCurrencyTranslation |  | 0.1 us-gaap_AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForCurrencyTranslation |
Liability [Member] |  |  |  |
Environmental Liability and Related Assets [Roll Forward] |  |  |  |
Environmental liability - Beginning balance | 94.6 us-gaap_AccrualForEnvironmentalLossContingencies / us-gaap_FairValueByLiabilityClassAxis = us-gaap_LiabilityMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |  | 96.1 us-gaap_AccrualForEnvironmentalLossContingencies / us-gaap_FairValueByLiabilityClassAxis = us-gaap_LiabilityMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |
Accruals added during the period for new matters, Liability | 0.1 us-gaap_AccrualForEnvironmentalLossContingenciesProvisionForNewLosses / us-gaap_FairValueByLiabilityClassAxis = us-gaap_LiabilityMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |  | 0.5 us-gaap_AccrualForEnvironmentalLossContingenciesProvisionForNewLosses / us-gaap_FairValueByLiabilityClassAxis = us-gaap_LiabilityMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |
Net cash activity, Liability | (12.6)us-gaap_AccrualForEnvironmentalLossContingenciesPayments / us-gaap_FairValueByLiabilityClassAxis = us-gaap_LiabilityMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |  | (12.1)us-gaap_AccrualForEnvironmentalLossContingenciesPayments / us-gaap_FairValueByLiabilityClassAxis = us-gaap_LiabilityMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |
Foreign currency, Liability | (0.5)itt_AccrualForEnvironmentalLossContingenciesLiabilitiesForCurrencyTranslation / us-gaap_FairValueByLiabilityClassAxis = us-gaap_LiabilityMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |  | 0.1 itt_AccrualForEnvironmentalLossContingenciesLiabilitiesForCurrencyTranslation / us-gaap_FairValueByLiabilityClassAxis = us-gaap_LiabilityMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |
Environmental liability - Ending balance | 89.9 us-gaap_AccrualForEnvironmentalLossContingencies / us-gaap_FairValueByLiabilityClassAxis = us-gaap_LiabilityMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |  | 94.6 us-gaap_AccrualForEnvironmentalLossContingencies / us-gaap_FairValueByLiabilityClassAxis = us-gaap_LiabilityMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |
Asset [Member] |  |  |  |
Environmental Liability and Related Assets [Roll Forward] |  |  |  |
Environmental liability - Asset, Beginning balance | 11.7 itt_EstimatedEnvironmentalRelatedAssets / us-gaap_FairValueByLiabilityClassAxis = itt_AssetMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |  | 12.3 itt_EstimatedEnvironmentalRelatedAssets / us-gaap_FairValueByLiabilityClassAxis = itt_AssetMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |
Accruals added during the period for new matters, Assets | 0 itt_EstimatedEnvironmentalRelatedAssetsAcquired / us-gaap_FairValueByLiabilityClassAxis = itt_AssetMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |  | 0 itt_EstimatedEnvironmentalRelatedAssetsAcquired / us-gaap_FairValueByLiabilityClassAxis = itt_AssetMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |
Net cash activity, Asset | (0.3)itt_EstimatedEnvironmentalRelatedAssetsPayment / us-gaap_FairValueByLiabilityClassAxis = itt_AssetMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |  | (0.5)itt_EstimatedEnvironmentalRelatedAssetsPayment / us-gaap_FairValueByLiabilityClassAxis = itt_AssetMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |
Foreign currency, Asset | 0 itt_AccrualForEnvironmentalLossContingenciesAssetsForCurrencyTranslation / us-gaap_FairValueByLiabilityClassAxis = itt_AssetMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |  | 0 itt_AccrualForEnvironmentalLossContingenciesAssetsForCurrencyTranslation / us-gaap_FairValueByLiabilityClassAxis = itt_AssetMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |
Environmental liability - Asset, Ending balance | 7.7 itt_EstimatedEnvironmentalRelatedAssets / us-gaap_FairValueByLiabilityClassAxis = itt_AssetMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |  | 11.7 itt_EstimatedEnvironmentalRelatedAssets / us-gaap_FairValueByLiabilityClassAxis = itt_AssetMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |
Additions [Member] |  |  |  |
Environmental Liability and Related Assets [Roll Forward] |  |  |  |
Continuing Operation, Net | 14.9 itt_ChangeInEstimatedEnvironmentalPreExistingRelatedAccrualsOrAssetsForContinuingOperationNet / itt_AccrualandReceivableAdditionsandReversalsAxis = itt_AdditionsMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember | [1] | 14.5 itt_ChangeInEstimatedEnvironmentalPreExistingRelatedAccrualsOrAssetsForContinuingOperationNet / itt_AccrualandReceivableAdditionsandReversalsAxis = itt_AdditionsMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember | [1]
Additions [Member] | Liability [Member] |  |  |  |
Environmental Liability and Related Assets [Roll Forward] |  |  |  |
Continuing operations, Liability | 11.2 itt_AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimatesRelatedToContinuingOperation / itt_AccrualandReceivableAdditionsandReversalsAxis = itt_AdditionsMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_LiabilityMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |  | 14.4 itt_AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimatesRelatedToContinuingOperation / itt_AccrualandReceivableAdditionsandReversalsAxis = itt_AdditionsMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_LiabilityMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |
Additions [Member] | Asset [Member] |  |  |  |
Environmental Liability and Related Assets [Roll Forward] |  |  |  |
Continuing operations, Asset | (3.7)itt_ChangeInEstimatedEnvironmentalPreExistingRelatedAssetsForContinuingOperation / itt_AccrualandReceivableAdditionsandReversalsAxis = itt_AdditionsMember / us-gaap_FairValueByLiabilityClassAxis = itt_AssetMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |  | (0.1)itt_ChangeInEstimatedEnvironmentalPreExistingRelatedAssetsForContinuingOperation / itt_AccrualandReceivableAdditionsandReversalsAxis = itt_AdditionsMember / us-gaap_FairValueByLiabilityClassAxis = itt_AssetMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |
Reversal [Member] |  |  |  |
Environmental Liability and Related Assets [Roll Forward] |  |  |  |
Continuing Operation, Net | (2.9)itt_ChangeInEstimatedEnvironmentalPreExistingRelatedAccrualsOrAssetsForContinuingOperationNet / itt_AccrualandReceivableAdditionsandReversalsAxis = itt_ReversalMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember | [1] | (4.4)itt_ChangeInEstimatedEnvironmentalPreExistingRelatedAccrualsOrAssetsForContinuingOperationNet / itt_AccrualandReceivableAdditionsandReversalsAxis = itt_ReversalMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember | [1]
Reversal [Member] | Liability [Member] |  |  |  |
Environmental Liability and Related Assets [Roll Forward] |  |  |  |
Continuing operations, Liability | (2.9)itt_AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimatesRelatedToContinuingOperation / itt_AccrualandReceivableAdditionsandReversalsAxis = itt_ReversalMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_LiabilityMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |  | (4.4)itt_AccrualForEnvironmentalLossContingenciesIncreaseDecreaseForRevisionInEstimatesRelatedToContinuingOperation / itt_AccrualandReceivableAdditionsandReversalsAxis = itt_ReversalMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_LiabilityMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |
Reversal [Member] | Asset [Member] |  |  |  |
Environmental Liability and Related Assets [Roll Forward] |  |  |  |
Continuing operations, Asset | $ 0 itt_ChangeInEstimatedEnvironmentalPreExistingRelatedAssetsForContinuingOperation / itt_AccrualandReceivableAdditionsandReversalsAxis = itt_ReversalMember / us-gaap_FairValueByLiabilityClassAxis = itt_AssetMember / us-gaap_PlanNameAxis = itt_EnvironmentalRelatedMattersMember |  |  |
[1] | (a)Changes in estimates for pre-existing accruals includes environmental-related costs of $2.7 and $1.5 reported within results of discontinued operations for the years ended December 31, 2014 and 2013, respectively.

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- Definition Accrual For Environmental Loss Contingencies Assets For Currency Translation + References No definition available. + Details
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- Definition Accrual for environmental loss contingencies increase decrease for revision in estimates related to continuing operation. + References No definition available. + Details
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- Definition Accrual For Environmental Loss Contingencies Liabilities For Currency Translation + References No definition available. + Details
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- Definition Change in estimated environmental pre existing related accruals or assets for continuing operation net. + References No definition available. + Details
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- Definition Change in estimated environmental Pre existing related assets for continuing operation. + References No definition available. + Details
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- Details
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- Definition Estimated environmental related assets. + References No definition available. + Details
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Namespace Prefix: | itt_
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Balance Type: | debit
Period Type: | instant

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- Definition Estimated environmental related assets acquired. + References No definition available. + Details
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Namespace Prefix: | itt_
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Balance Type: | debit
Period Type: | duration

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- Definition Estimated environmental related assets or accruals acquired net. + References No definition available. + Details
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Namespace Prefix: | itt_
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- Definition Estimated environmental related assets payment. + References No definition available. + Details
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Namespace Prefix: | itt_
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- Definition Estimated environmental related or accrual assets payment net. + References No definition available. + Details
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- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346 + Details
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- Definition The Increase or Decrease in the accrual for environmental loss contingencies during the reporting period related to currency translations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q2) -URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Foreign Currency Translation -URI http://asc.fasb.org/extlink&oid=6513664 + Details
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- Definition The aggregate amount disbursed during the reporting period to settle environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q2) -URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 + Details
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- Definition The amount added to the accrual for newly incurred environmental loss contingencies. These additions include remediation expense and interest accretion. These additions do not relate to changes in the environmental accrual related to a business acquisition or divestiture, to currency movements, or revisions in previously existing estimates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q2) -URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 + Details
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