Quarterly Data - Schedule of Quarterly Data (Parenthetical) (Detail) € in Millions, $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2015 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Income Statement [Abstract]
Restructuring and other charges	$ 735		€ 150	$ 1,195	$ 1,168	$ 782
Restructuring and other charges, after-tax and noncontrolling interest	507			836	$ 703	585
Discrete income tax charge	190
Loss from divestitures before income tax		$ 332
Net loss , after tax and noncontrolling interest		$ 163
Impairment of goodwill	$ 25			$ 25		$ 1,731