Consolidated Revenue Information by Geographic Area (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Intersegment Revenue	$ 865.6	$ 767.2
U S
Segment Reporting Information [Line Items]
Intersegment Revenue	499.8	425.6
International Regions [Member]
Segment Reporting Information [Line Items]
Intersegment Revenue	365.8	341.6
International Regions [Member] | Europe Middle East And Africa [Member]
Segment Reporting Information [Line Items]
Intersegment Revenue	227.6	220.6
International Regions [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Intersegment Revenue	86.1	69.9
International Regions [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Intersegment Revenue	$ 52.1	$ 51.1