Segments, Geographical (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Net Revenues by Geographic Region [Line Items]
Total net revenues	$ 1,170.1	$ 1,059.2
Property and equipment, net	905.7		882.3
United States [Member]
Net Revenues by Geographic Region [Line Items]
Total net revenues	623.7	547.0
Property and equipment, net	823.0		801.3
Other [Member]
Net Revenues by Geographic Region [Line Items]
Total net revenues	57.8	45.1
Americas [Member]
Net Revenues by Geographic Region [Line Items]
Total net revenues	681.5	592.1
EMEA [Member]
Net Revenues by Geographic Region [Line Items]
Total net revenues	295.7	290.6
Asia Pacific [Member]
Net Revenues by Geographic Region [Line Items]
Total net revenues	192.9	176.5
International [Member]
Net Revenues by Geographic Region [Line Items]
Property and equipment, net	$ 82.7		$ 81.0