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Goodwill and Intangible Assets, Net (Schedule of Finite-Lived Intangible Assets, Net) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Dec. 31, 2011
Gross Asset Value      
Acquisitions (Note 3) $ 13 [1]    
Exchange rate changes 13    
Gross asset value 620   594
Accumulated Amortization      
Amortization (13) (16)  
Exchange rate changes (12)    
Accumulated amortization (503)   (478)
Net book value 117    
Weighted average life of intangible assets acquired 6    
Licenses [Member]
     
Gross Asset Value      
Acquisitions (Note 3) 0    
Exchange rate changes 0    
Gross asset value 32   32
Accumulated Amortization      
Amortization (1)    
Exchange rate changes 0    
Accumulated amortization (14)   (13)
Net book value 18    
Customer-Related Intangible Assets [Member]
     
Gross Asset Value      
Acquisitions (Note 3) 4    
Exchange rate changes 13    
Gross asset value 530   513
Accumulated Amortization      
Amortization (10)    
Exchange rate changes (11)    
Accumulated amortization (454)   (433)
Net book value 76    
Developed Technology [Member]
     
Gross Asset Value      
Acquisitions (Note 3) 3    
Exchange rate changes 0    
Gross asset value 30   27
Accumulated Amortization      
Amortization (1)    
Exchange rate changes 0    
Accumulated amortization (15)   (14)
Net book value 15    
Covenants Not to Compete and Other [Member]
     
Gross Asset Value      
Acquisitions (Note 3) 6    
Exchange rate changes 0    
Gross asset value 28   22
Accumulated Amortization      
Amortization (1)    
Exchange rate changes (1)    
Accumulated amortization (20)   (18)
Net book value $ 8    
[1] Weighted average amortization period of intangible assets acquired was 6 years.