Consolidated Revenue Information by Geographic Area (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]
Instersegment Revenue	$ 816,100,000	$ 705,500,000	$ 2,456,800,000	$ 2,193,300,000
U S
Segment Reporting Information [Line Items]
Instersegment Revenue	449,100,000	391,000,000	1,335,800,000	1,209,300,000
International Regions [Member]
Segment Reporting Information [Line Items]
Instersegment Revenue	367,000,000	314,500,000	1,121,000,000	984,000,000
International Regions [Member] | Europe Middle East And Africa [Member]
Segment Reporting Information [Line Items]
Instersegment Revenue	231,400,000	207,400,000	715,300,000	637,000,000
International Regions [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Instersegment Revenue	79,300,000	62,100,000	237,800,000	205,800,000
International Regions [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Instersegment Revenue	$ 56,300,000	$ 45,000,000	$ 167,900,000	$ 141,200,000