Acquisitions and Dispositions - Historical revenues from services (Details) - USD ($) $ in Millions			12 Months Ended
		Dec. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Revenues from services	[1]		$ 18,914.5	$ 19,827.5	$ 20,724.4
Net earnings			$ 88.8	$ 373.8	382.4
Ettain Group Member
Business Acquisition [Line Items]
Revenues from services		$ 182.7			21,269.1
Net earnings					$ 425.4

[1] (a) The United States revenues above represent revenues from our company-owned branches and franchise fees received from our franchise operations, which were $11.9, $12.8 and $12.8 for 2023, 2022, and 2021, respectively.