Segment Reporting (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	$ 14,692.2	$ 14,289.1	$ 14,289.4
Americas
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	8,337.8	8,185.0	8,005.8
Long-lived assets and goodwill	7,749.5	7,727.0	7,629.2
EMEA
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	4,576.5	4,357.2	4,487.2
Long-lived assets and goodwill	3,523.3	3,315.2	3,615.5
Asia-Pacific
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	1,777.9	1,746.9	1,796.4
Long-lived assets and goodwill	$ 730.8	$ 757.2	$ 689.0