Revenues By Geographic Area (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Segment Reporting Information [Line Items]
Total consolidated revenues	$ 5,387,383	$ 5,094,378
United States
Segment Reporting Information [Line Items]
Total consolidated revenues	2,831,763	2,633,394
Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Total consolidated revenues	1,477,253	1,464,292
Asia Pacific And Japan
Segment Reporting Information [Line Items]
Total consolidated revenues	737,996	711,693
Latin America, Mexico And Canada
Segment Reporting Information [Line Items]
Total consolidated revenues	$ 340,371	$ 284,999