Restructuring and Other Charges - Schedule of Restructuring and Other Charges (Detail) € in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2015 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Restructuring and Related Activities [Abstract]
Asset impairments			$ 335	$ 406	$ 116
Layoff costs			299	259	201
Legal matters in Italy (N)			201
Net loss on divestitures of businesses (F)			161	332
Resolution of a legal matter (N)					391
Other			213	199	82
Reversals of previously recorded layoff and other exit costs			(14)	(28)	(8)
Restructuring and other charges	$ 735	€ 150	$ 1,195	$ 1,168	$ 782