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Receivables, Net - Receivables, Net (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Receivables [Abstract]        
Trade accounts receivable $ 476.8us-gaap_AccountsReceivableGrossCurrent $ 463.9us-gaap_AccountsReceivableGrossCurrent    
Notes receivable 6.1us-gaap_NotesAndLoansReceivableGrossCurrent 6.3us-gaap_NotesAndLoansReceivableGrossCurrent    
Other 30.5us-gaap_OtherReceivables 39.1us-gaap_OtherReceivables    
Receivables, gross 513.4itt_ReceivablesGrossCurrent 509.3itt_ReceivablesGrossCurrent    
Less: allowance for doubtful accounts 13.3us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent 12.6us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent 12.9us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent 12.9us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Receivables, net $ 500.1us-gaap_ReceivablesNetCurrent $ 496.7us-gaap_ReceivablesNetCurrent