Revenues By Geographic Area (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Segment Reporting Information [Line Items]
Total consolidated revenues	$ 5,311,393	$ 4,845,338	$ 10,405,771	$ 9,452,956
United States
Segment Reporting Information [Line Items]
Total consolidated revenues	2,856,914	2,507,142	5,490,308	4,878,174
Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Total consolidated revenues	1,400,339	1,407,571	2,864,631	2,794,354
Asia Pacific And Japan
Segment Reporting Information [Line Items]
Total consolidated revenues	747,561	654,301	1,459,254	1,249,365
Latin America, Mexico And Canada
Segment Reporting Information [Line Items]
Total consolidated revenues	$ 306,579	$ 276,324	$ 591,578	$ 531,063