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Goodwill and Intangible Assets - Amortizable Intangible Assets (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2014
Customer relationships
Dec. 31, 2013
Customer relationships
Mar. 31, 2014
Customer relationships
Minimum
Mar. 31, 2014
Customer relationships
Maximum
Mar. 31, 2014
Other
Dec. 31, 2013
Other
Mar. 31, 2014
Other
Minimum
Mar. 31, 2014
Other
Maximum
Finite-Lived Intangible Assets [Line Items]                    
Useful Lives         22 years 23 years     2 years 20 years
Gross Carrying Amount $ 235 $ 238 $ 212 $ 215     $ 23 $ 23    
Accumulated Amortization 77 75 64 63     13 12    
Net Amount $ 158 $ 163 $ 148 $ 152     $ 10 $ 11