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Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Allowance for Doubtful Accounts [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance beginning of year $ 161 $ 187 $ 209
Additions (Deductions) charged to costs and expenses 21 17 6
Charge off's and other (50) (43) (28)
Balance end of year 132 161 187
Reserve for Excess and Obsolete Inventories [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance beginning of year 644 800 1,017
Additions (Deductions) charged to costs and expenses 659 49 114
Charge off's and other (460) (205) (331)
Balance end of year 843 644 800
Valuation Allowance for Deferred Tax Assets [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance beginning of year 955 1,202 544
Additions (Deductions) charged to costs and expenses 218 49 280
Charge off's and other 2 (296) 378
Balance end of year 1,175 955 1,202
Environmental Accruals [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance beginning of year 66 38 43
Additions (Deductions) charged to costs and expenses 57 37 2
Charge off's and other (19) (9) (7)
Balance end of year 104 66 38
Warranty Reserve [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance beginning of year 105 135 172
Additions (Deductions) charged to costs and expenses 41 38 46
Charge off's and other (56) (68) (83)
Balance end of year $ 90 $ 105 $ 135