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Description of Business, Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Measurement period used to determine the long term expected return plan assets | 5 years |  |
Share-based compensation, vesting period | 3 years |  |
LIFO inventory, percentage of total | 15.10%us-gaap_PercentageOfLIFOInventory | 15.30%us-gaap_PercentageOfLIFOInventory |
LIFO inventory reserve amount recorded | $ 9.3 us-gaap_InventoryLIFOReserve | $ 9.2 us-gaap_InventoryLIFOReserve |
Short-term investments | 5.4 us-gaap_ShortTermInvestments | 112.9 us-gaap_ShortTermInvestments |
Maturities of time deposits, description | original maturity exceeding three months at the time of purchase. These investments mature within four months of the balance sheet date and have been presented in other current assets as short-term investments on the Consolidated Balance Sheet |  |
Other employee benefit-related assets | 93.0 itt_InvestmentsInCorporateOwnedLifeInsurance | 93.6 itt_InvestmentsInCorporateOwnedLifeInsurance |
Life Insurance, Corporate or Bank Owned, Change in Value | 4.6 us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue | 3.7 us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue | 1.3 us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue
Deferred Compensation Liability, Current and Noncurrent | 14.4 us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent | 14.9 us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent |
Acquisition measurement period | 12 months |  |
Minimum [Member] | Building and improvements [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Plant, property and equipment estimated useful life | 5 years |  |
Minimum [Member] | Machinery and equipment [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Plant, property and equipment estimated useful life | 2 years |  |
Minimum [Member] | Furniture and office equipment [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Plant, property and equipment estimated useful life | 3 years |  |
Minimum [Member] | Other plant, property and equipment [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Plant, property and equipment estimated useful life | 5 years |  |
Minimum [Member] | Software [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Capitalized Software Estimated Useful Life Range | 3 years |  |
Minimum [Member] | Intangible assets with a finite life amortized on a straight-line basis [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Capitalized Software Estimated Useful Life Range | 10 years |  |
Maximum [Member] | Building and improvements [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Plant, property and equipment estimated useful life | 40 years |  |
Maximum [Member] | Machinery and equipment [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Plant, property and equipment estimated useful life | 10 years |  |
Maximum [Member] | Furniture and office equipment [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Plant, property and equipment estimated useful life | 7 years |  |
Maximum [Member] | Other plant, property and equipment [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Plant, property and equipment estimated useful life | 40 years |  |
Maximum [Member] | Software [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Capitalized Software Estimated Useful Life Range | 7 years |  |
Maximum [Member] | Intangible assets with a finite life amortized on a straight-line basis [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Capitalized Software Estimated Useful Life Range | 20 years |  |
Foreign Exchange Contract [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Derivative, Notional Amount | 5.4 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember | 13.1 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember |
Interest Rate Swap [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Derivative, Notional Amount | $ 3.3 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember | $ 11.9 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember |
Customer Concentration Risk [Member] | Accounts Receivable [Member] |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |
Concentration Risk, Percentage | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember |  |

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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- Definition Amount of difference between inventory at lower of LIFO cost or market and inventory at lower of other inventory accounting method cost or market, for example, but not limited to, FIFO or average cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(c)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 6 -Subparagraph c -Article 5 + Details
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- Definition The change in cash surrender or contract value during the period which adjusted the amount of premiums paid in determining the expense or income recognized under the contract for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 30 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6384439&loc=d3e42048-111605 + Details
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