Operating Expenses (Schedule of Acquisition Related and Integration Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Total acquisition-related and integration costs	$ 216.1	$ 37.3	$ 30.2
IAA
Business Acquisition [Line Items]
Financing	30.0	0.0	0.0
Severance	41.1	0.0	0.0
Integration	34.5	0.0	0.0
Acceleration of share-based payments expense	6.8	0.0	0.0
Legal	12.3	7.8	0.0
Investment banking, consulting and other acquisition-related costs	68.8	13.5	0.0
Settlement of pre-existing contractual arrangement	16.3	0.0	0.0
Total acquisition-related and integration costs	209.8	21.3	0.0
Other acquisitions
Business Acquisition [Line Items]
Total acquisition-related and integration costs	$ 6.3	$ 16.0	$ 30.2