Guarantees, Indemnities and Warranties - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Guarantees [Abstract]
Guarantees, letters of credit and similar arrangements outstanding	$ 182.4

Guarantees, letters of credit and similar arrangements outstanding.

No definition available.

Name:	itt_GuaranteesLettersOfCreditAndSimilarArrangementsOutstanding
Namespace Prefix:	itt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant