Net Revenues by Segment (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Net revenues	$ 6,530	$ 6,396	$ 18,930	$ 19,153
Latin America Segment
Segment Reporting Information [Line Items]
Net revenues	908	868	2,666	2,528
Asia Middle East Africa Segment
Segment Reporting Information [Line Items]
Net revenues	1,405	1,443	4,290	4,404
Europe Segment
Segment Reporting Information [Line Items]
Net revenues	2,442	2,332	6,978	7,073
North America Segment
Segment Reporting Information [Line Items]
Net revenues	$ 1,775	$ 1,753	$ 4,996	$ 5,148