Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill	$ 6,095.3	$ 5,503.7	$ 5,504.8
Goodwill, Acquired During Period	566.5	96.3
Goodwill, Other Increase (Decrease)	1.2
Currency translation	23.9	(97.4)
Goodwill, Impaired, Accumulated Impairment Loss	2,496.0	2,496.0	2,496.0
Other Current Assets [Member]
Contract with Customer, Asset, after Allowance for Credit Loss	458.4	201.2
Americas [Member]
Goodwill	4,675.3	4,226.8	4,185.2
Goodwill, Acquired During Period	453.7	45.3
Goodwill, Other Increase (Decrease)	(8.7)
Currency translation	3.5	(3.7)
EMEA [Member]
Goodwill	869.0	714.9	740.8
Goodwill, Acquired During Period	112.8	23.9
Goodwill, Other Increase (Decrease)	10.0
Currency translation	31.3	(49.8)
Asia Pacific [Member]
Goodwill	551.0	562.0	$ 578.8
Goodwill, Acquired During Period	0.0	27.1
Goodwill, Other Increase (Decrease)	(0.1)
Currency translation	$ (10.9)	$ (43.9)