Segment Reporting (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	$ 3,426.9	$ 3,406.9
Americas
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	2,035.7	2,068.7
Long-lived assets and goodwill	7,562.7	7,685.0
EMEA
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	991.2	978.9
Long-lived assets and goodwill	3,074.7	2,893.6
Asia-Pacific
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	400.0	359.3
Long-lived assets and goodwill	$ 644.8	$ 607.6