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Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Allowance for Doubtful Accounts [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance beginning of year $ 159 $ 125 $ 132
Additions (Deductions) charged to costs and expenses 52 77 31
Charge off's and other (2) (43) (38)
Balance end of year 209 159 125
Reserve for Excess and Obsolete Inventories [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance beginning of year 500 370 396
Additions (Deductions) charged to costs and expenses 606 186 128
Charge off's and other (89) (56) (154)
Balance end of year 1,017 500 370
Valuation Allowance for Deferred Tax Assets [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance beginning of year 63 48 133
Additions (Deductions) charged to costs and expenses 476 15 (83)
Charge off's and other 5   (2)
Balance end of year 544 63 48
Warranty Reserve [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance beginning of year 244 272 228
Additions (Deductions) charged to costs and expenses 50 92 123
Charge off's and other (122) (120) (79)
Balance end of year $ 172 $ 244 $ 272