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Commitments and Contingencies (Details) (USD $)
6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Affiliated Entity [Member]
Dec. 31, 2010
Affiliated Entity [Member]
Guarantees [Abstract]        
Maximum potential payments     $ 481,000,000 $ 500,000,000
Carrying value of recorded liabilities related to guarantees     40,000,000 43,000,000
Warranty [Abstract]        
Product warranty reserve, beginning balance 2,646,000,000 3,147,000,000    
Payments made during the period (1,020,000,000) (1,116,000,000)    
Changes in accrual related to warranties issued during the period 894,000,000 954,000,000    
Changes in accrual related to pre-existing warranties 91,000,000 95,000,000    
Foreign currency translation and other 63,000,000 (122,000,000)    
Product warranty reserve, ending balance 2,674,000,000 2,958,000,000    
Loss Contingency [Abstract]        
Loss contingency estimate $ 2,700,000,000