Annual report pursuant to Section 13 and 15(d)

Summary of Intangible Assets (Detail)

v2.4.0.6
Summary of Intangible Assets (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Year
Dec. 31, 2010
Intangible Assets by Major Class [Line Items]    
Gross Carrying Amount $ 2,389 $ 2,322
Accumulated Amortization (1,804) (1,723)
Net Carrying Value 585 599
Weighted-Average Amortization Period (in years) 4.4  
Trademarks, licenses, patents, and other
    
Intangible Assets by Major Class [Line Items]    
Gross Carrying Amount 146 187
Accumulated Amortization (54) (50)
Net Carrying Value 92 137
Weighted-Average Amortization Period (in years) 4.3  
Customer lists
    
Intangible Assets by Major Class [Line Items]    
Gross Carrying Amount 120 99
Accumulated Amortization (66) (59)
Net Carrying Value 54 40
Weighted-Average Amortization Period (in years) 11.5  
Franchise rights
    
Intangible Assets by Major Class [Line Items]    
Gross Carrying Amount 109 109
Accumulated Amortization (58) (52)
Net Carrying Value 51 57
Weighted-Average Amortization Period (in years) 20.0  
Capitalized software
    
Intangible Assets by Major Class [Line Items]    
Gross Carrying Amount 2,014 1,927
Accumulated Amortization (1,626) (1,562)
Net Carrying Value $ 388 $ 365
Weighted-Average Amortization Period (in years) 3.1