Summary of Amounts Reclassification from AOCI to Net Income (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales		$ 1,563	$ 1,431
Reclassifications, Total before tax		438	328
Reclassifications, Income tax expense		(49)	(55)
Net income		389	272
Other (income) expense, net		18	(11)
Amounts reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	[1]	(18)	(25)
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]	(18)	(34)
Reclassifications, Total before tax	[1]	(18)	(34)
Reclassifications, Income tax expense	[1]	3	11
Net income	[1]	(15)	(23)
Gains on hedging activities | Amounts reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, Total before tax	[1]	(4)	2
Reclassifications, Income tax expense	[1]	1	(1)
Net income	[1]	(3)	1
Gains on hedging activities | Foreign exchange contract | Amounts reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	[1]	$ (4)	2
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)
Reclassifications, Income tax expense	[1]		1
Net income	[1]		$ (3)

[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 11.