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Discontinued Operations (Details Textual) (USD $)
In Millions, unless otherwise specified
 2 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
Xylem and Exelis [Member]
Dec. 31, 2010
Xylem and Exelis [Member]
Dec. 31, 2011
Xylem [Member]
Dec. 31, 2011
Exelis [Member]
Oct. 31, 2011
Exelis [Member]
Contracts
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                  
Employee health benefits cost         $ 22        
Maximum billing amount of employee health benefit plans           1      
Amount receivable associated with transactions related to transition services agreements 315   396 315 1        
Receivable from Exelis and Xylem included in other assets             4    
Amount payable associated with transactions related to the transition services agreements 397   364 397 1        
Minimum percentage of contingent liabilities             39.00%    
Maximum percentage of contingent liabilities               40.00%  
Amount billed under subcontract pending novation               250  
Number of subcontracts pending under subcontract pending novation agreement                 425
Percentage share of contingent liabilities     21.00%            
Proceeds from contribution from subsidiaries             988 683  
Discontinued Operations                  
General corporate overhead costs 0 0              
Minimum Period for Providing Transition Period     3 months            
Maximum period for providing transition period     24 months            
Percentage of Escalation Over Cost     10.00%            
Proceeds from the sale of segment       $ 237