Consolidated Revenue Information by Geographic Area (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Revenue	$ 767.2	$ 731.8
Europe Middle East And Africa [Member]
Segment Reporting Information [Line Items]
Revenue	220.6	207.2
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenue	69.9	68.3
Americas [Member]
Segment Reporting Information [Line Items]
Revenue	51.1	46.5
U S
Segment Reporting Information [Line Items]
Revenue	425.6	409.8
International Regions [Member]
Segment Reporting Information [Line Items]
Revenue	$ 341.6	$ 322.0