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Postretirement Benefit Plans - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Participant
Dec. 31, 2011
Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]      
Employees Related expenses in SRP   $ 15.3 $ 8.6
Stock fund held approximately 0.2    
Active participants in numerous defined benefit pension plans 2,400    
Accumulated benefit obligation 383.7 328.4  
Long-term annual rate of return for domestic pension plans 8.00% 9.00% 9.00%
Assumed rate of future decrease in per capita cost of health care for 2021 4.50%    
Effect of one percent increase on benefit obligation 26.8    
Effect of one percent increase on annual service and interest cost components 1.9    
Effect of one percent decrease on benefit obligation 21.8    
Effect of one percent decrease on annual service and interest cost components 1.5    
Foreign government plan assets 2.0    
Contributions made to postretirement pension plans 71.0 30.8  
Remeasurement of contributions made to pension plans 41.2    
After-tax adjustment to unrecognized actuarial loss 9.3    
Contribution related to pension 3.8    
Part of net contribution expected to be made in first quarter 0.6    
Maximum [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Maturities period corporate bonds 30 years    
Minimum [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Maturities period corporate bonds 0 years    
Defined Contribution Plans [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Contributions made to pension plans 13.5 8.2 6.9
Company contribution percentage of base pay prior to enhancement   3.50%  
Period of distribution   5 years  
Defined Contribution Plans [Member] | Maximum [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Company contribution percentage of base pay post enhancement   7.00%  
Percentage of transition credit   5.00%  
Defined Contribution Plans [Member] | Minimum [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Company contribution percentage of base pay post enhancement   6.00%  
ITT Pension Plan for Bargaining Unit Employees Seneca Falls [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Projected Benefit Obligation 27.00%    
ITT Consolidated Hourly Pension Plan [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Projected Benefit Obligation 23.00%    
Other Non Qualified Us Plan [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Projected Benefit Obligation 28.00%    
International Pension Plan [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Projected Benefit Obligation 22.00%    
Long-term annual rate of return for domestic pension plans 4.70% 4.80%  
Contributions made to postretirement pension plans 3.0 3.2  
U.S. Pension Plans [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Long-term annual rate of return for domestic pension plans 8.00% 9.00%  
Contributions made to postretirement pension plans 58.3 18.2  
Pre-age 65 retirees [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Assumed rate of future increase in per capita cost of health care for 2013 8.50%    
Post-age 65 retirees [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Assumed rate of future increase in per capita cost of health care for 2013 6.50%    
Us Pension Plan [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Contributions made to postretirement pension plans $ 58.3 $ 18.2  
Exelis [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Shares held in Retirement Savings Plan for salaried employees and Hourly Savings Plan 0    
Xylem [Member]
     
Defined Benefit Plan Disclosure [Line Items]      
Shares held in Retirement Savings Plan for salaried employees and Hourly Savings Plan 0