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Segment Information - Additional Information (Detail) - Segment | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Segment Reporting [Abstract] |  |  |
Number of reportable segments | 4 |  |
Percentage of Revenue attributable to a Single Customer | 9.10% | 9.20% | 10.10%

X
- Definition Maximum percentage of revenue for which an Individual customer accounts for. + References No definition available. + Details
Name: | itt_MaximumPercentageOfRevenueForWhichIndividualCustomerAccountsFor
Namespace Prefix: | itt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration