Summary of Amounts Reclassification from AOCI to Net Income (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other (income) expense, net		$ 12	$ (44)	$ (10)	$ 4,286
Cost of sales		1,579	1,487	4,487	4,510
Reclassifications, Total before tax		290	128	924	4,675
Reclassifications, Income tax expense (benefit)		(42)	(1)	(139)	51
Net income		251	130	788	4,722
Amounts reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	[1]	(25)	(18)	(104)	4,473
Translation adjustments | Amounts reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, Total before tax	[1]			(29)
Net income	[1]			(29)
Translation adjustments | Loss on Venezuela deconsolidation | Amounts reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other (income) expense, net	[1]			(29)
Amortization of pension and other employee benefits items | Amounts reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Actuarial losses and other	[1],[2]	(35)	(31)	(103)	(98)
Reclassifications, Total before tax	[1]	(35)	(31)	(103)	(98)
Reclassifications, Income tax expense (benefit)	[1]	12	11	34	31
Net income	[1]	(23)	(20)	(69)	(67)
Gains (losses) on hedging activities | Amounts reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, Total before tax	[1]	(3)	3	(4)	6
Reclassifications, Income tax expense (benefit)	[1]	1	(1)	1	(2)
Net income	[1]	(2)	2	(3)	4
Gains (losses) on hedging activities | Foreign exchange contract | Amounts reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	[1]	$ (3)	(2)	(4)	(3)
Gains (losses) on hedging activities | Interest rate contracts | Amounts reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other (income) expense, net	[1]		$ 5		9
Other-than-temporary impairment of equity securities | Amounts reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other (income) expense, net	[1]			(4)
Available-for-sale-securities | Amounts reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, Total before tax	[1]			(4)	4,536
Reclassifications, Income tax expense (benefit)	[1]			1
Net income	[1]			$ (3)	4,536
Gains on sale of equity securities | Amounts reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other (income) expense, net	[1]				$ 4,536

[1] Amounts in parentheses indicate reductions to net income.

[2] These AOCI components are included in the computation of net periodic benefit cost disclosed in Note 10.