Segment Reporting (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	$ 3,406.9	$ 3,468.9
Americas
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	2,068.7	2,078.2
Long-lived assets and goodwill	7,685.0	7,703.9
EMEA
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	978.9	1,024.5
Long-lived assets and goodwill	2,893.6	3,004.3
Asia-Pacific
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	359.3	366.2
Long-lived assets and goodwill	$ 607.6	$ 655.8