Geographic Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 931.3	$ 806.4	$ 1,832.4	$ 1,598.4
Property and equipment, net	241.8		241.8		$ 257.3
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	614.1	540.3	1,212.1	1,069.9
Property and equipment, net	185.7		185.7		198.3
FRANCE
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	25.5		25.5		27.0
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	317.2	$ 266.1	620.3	$ 528.5
All other international
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 30.6		$ 30.6		$ 32.0