Segment Reporting - Geographical (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	$ 4,037.1	$ 3,882.6	$ 11,743.1	$ 11,366.9
Americas
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	2,371.7	2,253.7	6,903.9	6,645.9
Long-lived assets and goodwill	8,083.0	8,181.3	8,083.0	8,181.3
EMEA
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	1,202.8	1,144.1	3,501.1	3,397.0
Long-lived assets and goodwill	3,981.7	3,933.0	3,981.7	3,933.0
Asia-Pacific
Revenue and Long-Lived Assets and Goodwill by Geographic Region
Revenue	462.6	484.8	1,338.1	1,324.0
Long-lived assets and goodwill	$ 716.5	$ 726.0	$ 716.5	$ 726.0