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Warranty Reserve Activity (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Guarantor Obligations [Line Items]      
Beginning balance at January 1 $ 8 $ 6 $ 6
Accruals for warranties issued 15 17 13
Settlements (in cash or kind) (15) (15) (13)
Balance at end of period $ 8 $ 8 $ 6