Segment Information Major Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues and Long-Lived Assets
Long-Lived Assets	$ 2,494.0				$ 2,843.8				$ 2,494.0	$ 2,843.8
Net revenue	2,284.4	$ 1,954.6	$ 1,853.4	$ 1,972.1	2,433.0	$ 2,061.4	$ 2,125.9	$ 2,004.8	8,064.5	8,625.1	$ 8,031.6
Domestic
Revenues and Long-Lived Assets
Long-Lived Assets	1,801.4				2,080.4				1,801.4	2,080.4
Total International
Revenues and Long-Lived Assets
Long-Lived Assets	692.6				763.4				692.6	763.4
Net revenue									2,853.1	3,239.0	3,206.6
United Kingdom
Revenues and Long-Lived Assets
Long-Lived Assets	216.6				167.6				216.6	167.6
Net revenue									664.3	727.0	711.7
Continental Europe
Revenues and Long-Lived Assets
Long-Lived Assets	117.5				149.7				117.5	149.7
Net revenue									683.6	742.4	737.5
Asia Pacific
Revenues and Long-Lived Assets
Long-Lived Assets	183.1				240.9				183.1	240.9
Net revenue									710.5	858.3	896.8
Latin America
Revenues and Long-Lived Assets
Long-Lived Assets	58.9				74.8				58.9	74.8
Net revenue									323.4	389.9	350.1
Other
Revenues and Long-Lived Assets
Long-Lived Assets	$ 116.5				$ 130.4				116.5	130.4
Net revenue									$ 471.3	$ 521.4	$ 510.5