Components of Restructuring Charges (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 31	$ 130	$ 50	$ 237
Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	31	106	54	159
Reserve adjustments		(5)	(14)	(14)
Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			5	24
Reserve adjustments		(4)
Asset Impairments
Restructuring Cost and Reserve [Line Items]
Restructuring charges		33	5	68
Cost of Goods Sold
Restructuring Cost and Reserve [Line Items]
Restructuring charges	7	24	19	88
Cost of Goods Sold | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	7	21	21	52
Reserve adjustments			(7)	(1)
Cost of Goods Sold | Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges				9
Reserve adjustments		(3)
Cost of Goods Sold | Asset Impairments
Restructuring Cost and Reserve [Line Items]
Restructuring charges		6	5	28
Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	24	81	33	85
Selling, General and Administrative Expenses | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 24	84	33	94
Reserve adjustments		(3)	(5)	(11)
Selling, General and Administrative Expenses | Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			5	2
Research and Development Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges		25	(2)	64
Research and Development Expenses | Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		1		13
Reserve adjustments		(2)	$ (2)	(2)
Research and Development Expenses | Contract Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges				13
Reserve adjustments		(1)
Research and Development Expenses | Asset Impairments
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 27		$ 40