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Income Taxes Rollforward of Deferred Tax Assets Valuation Allowance (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Valuation Allowance [Line Items] |  |  |
Deferred Tax Assets, Valuation Allowance | $ 135.3 us-gaap_DeferredTaxAssetsValuationAllowance | $ 536.7 us-gaap_DeferredTaxAssetsValuationAllowance | $ 480.4 us-gaap_DeferredTaxAssetsValuationAllowance
Deferred Tax Asset Valuation Allowance, Change in Assessment | 2.5 itt_DeferredTaxAssetValuationAllowanceChangeinAssessment | (370.9)itt_DeferredTaxAssetValuationAllowanceChangeinAssessment | (6.5)itt_DeferredTaxAssetValuationAllowanceChangeinAssessment
Deferred Tax Asset Valuation Allowance, Current Year Operations | 9.3 itt_DeferredTaxAssetValuationAllowanceCurrentYearOperations | (30.5)itt_DeferredTaxAssetValuationAllowanceCurrentYearOperations | 62.8 itt_DeferredTaxAssetValuationAllowanceCurrentYearOperations
Deferred Tax Assets, Valuation Allowance | 147.1 us-gaap_DeferredTaxAssetsValuationAllowance | 135.3 us-gaap_DeferredTaxAssetsValuationAllowance | 536.7 us-gaap_DeferredTaxAssetsValuationAllowance
Domestic Tax Authority [Member] |  |  |
Valuation Allowance [Line Items] |  |  |
Deferred Tax Assets, Valuation Allowance | 0 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 352.8 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 327.0 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
Deferred Tax Asset Valuation Allowance, Change in Assessment | 0 itt_DeferredTaxAssetValuationAllowanceChangeinAssessment / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | (339.6)itt_DeferredTaxAssetValuationAllowanceChangeinAssessment / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 0 itt_DeferredTaxAssetValuationAllowanceChangeinAssessment / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
Deferred Tax Asset Valuation Allowance, Current Year Operations | 0 itt_DeferredTaxAssetValuationAllowanceCurrentYearOperations / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | (13.2)itt_DeferredTaxAssetValuationAllowanceCurrentYearOperations / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 25.8 itt_DeferredTaxAssetValuationAllowanceCurrentYearOperations / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
Deferred Tax Assets, Valuation Allowance | 0 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 0 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember | 352.8 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember
State and Local Jurisdiction [Member] |  |  |
Valuation Allowance [Line Items] |  |  |
Deferred Tax Assets, Valuation Allowance | 44.7 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 122.4 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 127.5 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Deferred Tax Asset Valuation Allowance, Change in Assessment | 0 itt_DeferredTaxAssetValuationAllowanceChangeinAssessment / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | (35.0)itt_DeferredTaxAssetValuationAllowanceChangeinAssessment / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 0 itt_DeferredTaxAssetValuationAllowanceChangeinAssessment / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Deferred Tax Asset Valuation Allowance, Current Year Operations | 0.3 itt_DeferredTaxAssetValuationAllowanceCurrentYearOperations / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | (42.7)itt_DeferredTaxAssetValuationAllowanceCurrentYearOperations / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | (5.1)itt_DeferredTaxAssetValuationAllowanceCurrentYearOperations / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Deferred Tax Assets, Valuation Allowance | 45.0 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 44.7 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 122.4 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Foreign Tax Authority [Member] |  |  |
Valuation Allowance [Line Items] |  |  |
Deferred Tax Assets, Valuation Allowance | 90.6 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember | 61.5 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember | 25.9 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember
Deferred Tax Asset Valuation Allowance, Change in Assessment | 2.5 itt_DeferredTaxAssetValuationAllowanceChangeinAssessment / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember | 3.7 itt_DeferredTaxAssetValuationAllowanceChangeinAssessment / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember | (6.5)itt_DeferredTaxAssetValuationAllowanceChangeinAssessment / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember
Deferred Tax Asset Valuation Allowance, Current Year Operations | 9.0 itt_DeferredTaxAssetValuationAllowanceCurrentYearOperations / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember | 25.4 itt_DeferredTaxAssetValuationAllowanceCurrentYearOperations / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember | 42.1 itt_DeferredTaxAssetValuationAllowanceCurrentYearOperations / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember
Deferred Tax Assets, Valuation Allowance | $ 102.1 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember | $ 90.6 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember | $ 61.5 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember

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- Definition Deferred Tax Asset Valuation Allowance, Change in Assessment + References No definition available. + Details
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- Definition Deferred Tax Asset Valuation Allowance, Current Year Operations + References No definition available. + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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