Restructuring and Other Charges - Activity and Reserve Balances for Restructuring Charges (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	$ 685	$ 155	$ 214	$ 314
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Asset retirement obligations		8		8
Environmental Remediation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges		2		$ 18
Warranties, Lease Terminations and Tax Indemnities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges			$ 5
Legal Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges		$ 4