Operating Expenses (Schedule of Acquisition Related and Integration Costs) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Business Acquisition [Line Items]
Total acquisition-related and integration costs	$ 12.8	$ 126.2
IAA
Business Acquisition [Line Items]
Financing	0.0	30.0
Severance	5.2	14.0
Integration	5.4	5.1
Acceleration of share-based payments expense	0.9	5.0
Legal	0.0	9.5
Investment banking, consulting and other acquisition-related costs	1.1	61.6
Total acquisition-related and integration costs	12.6	125.2
Other acquisitions
Business Acquisition [Line Items]
Total acquisition-related and integration costs	$ 0.2	$ 1.0