Revenues By Geographic Area (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Total consolidated revenues	$ 5,539	$ 5,278	$ 16,540	$ 15,684
United States
Segment Reporting Information [Line Items]
Total consolidated revenues	2,956	2,886	8,752	8,376
Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Total consolidated revenues	1,455	1,352	4,418	4,216
Asia Pacific And Japan
Segment Reporting Information [Line Items]
Total consolidated revenues	789	733	2,361	2,193
Latin America, Mexico And Canada
Segment Reporting Information [Line Items]
Total consolidated revenues	$ 339	$ 307	$ 1,009	$ 899