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Schedule II - Valuation and Qualifying Accounts (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Allowance for doubtful accounts [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance beginning of year $ 120 $ 107 $ 107
Additions (Deductions) charged to costs and expenses 32 6 9
Charge off's and other (20) 7 (9)
Balance end of year 132 120 107
Allowance for excess and obsolete inventories [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance beginning of year 338 281 270
Additions (Deductions) charged to costs and expenses 89 99 70
Charge off's and other (31) (42) (59)
Balance end of year 396 338 281
Valuation allowance for deferred tax assets [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance beginning of year 93 13 9
Additions (Deductions) charged to costs and expenses 40 80 4
Charge off's and other       
Balance end of year 133 93 13
Warranty reserve [Member]
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance beginning of year 194 211 215
Additions (Deductions) charged to costs and expenses 101 51 40
Charge off's and other (67) (68) (44)
Balance end of year $ 228 $ 194 $ 211