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Long-Term Incentive Employee Compensation - Additional Information (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
 1 Months Ended 12 Months Ended 10 Months Ended 12 Months Ended
Oct. 31, 2011
Dec. 31, 2012
Y
Dec. 31, 2011
Dec. 31, 2010
Oct. 31, 2011
Employee Stock Option [Member]
Oct. 31, 2011
Restricted Stock [Member]
Dec. 31, 2012
Options granted between 2004 and 2009 [Member]
Dec. 31, 2012
Options granted prior to 2004, during 2010 and 2011 [Member]
Dec. 31, 2012
TSR Plan Awards [Member]
Dec. 31, 2011
TSR Plan Awards [Member]
Dec. 31, 2010
TSR Plan Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Number of shares initially available for awards under this Stock Option plan   4.6                  
Share available for future grant under stock option   41.0                  
Unrecognized compensation cost related to unvested options and restricted stock   $ 17.9                  
Unrecognized compensation cost weighted average amortization period (years)   1 year 9 months 18 days                  
Option Modification Charge 7.9 0.5                  
Converted and Cancelled to the employees of Exelis/Xylem, shares         1.2 0.5          
Share-based compensation, vesting period   3 years                  
Options granted awards with a contractual term   4 years 2 months 12 days         7 years 10 years      
Intrinsic value of options exercised   24.7 29.8 22.3              
Cash received from the exercise of stock options   58.0 61.6 35.4              
Tax benefit realized from stock option exercises and restricted stock lapses   11.0 16.7 13.9              
Excess Tax benefit from stock activity   6.4 7.2 6.0              
ITT's closing stock price   $ 23.46                  
Exercisable options out of the money   0.1                  
Total number of stock option expected to vest   4.2                  
Weighted average price of stock options expected to vest   $ 18.41                  
Aggregate intrinsic value of stock options expected to vest   $ 21.8                  
Weighted average remaining contractual life stock option expected to vest   4.2                  
Total number of restricted Stock expected to vest   1.1                  
Performance period for measuring fair value of outstanding awards   3 years                  
Cash payments to settle awards                 0 0 17.9