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Operating Expenses (Schedule of Acquisition Related and Integration Costs) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Business Acquisition [Line Items]
Total acquisition-related and integration costs	$ 4.1	$ 46.3	$ 16.9	$ 172.5
IAA acquisition
Business Acquisition [Line Items]
Financing	0.0	0.0	0.0	30.0
Severance	2.5	8.7	7.7	22.7
Integration	1.6	12.0	7.0	17.1
Acceleration of share-based payments expense	0.0	0.9	0.9	5.9
Legal	0.0	2.6	0.0	12.1
Investment banking, consulting and other acquisition-related costs	0.0	2.7	1.1	64.3
Settlement of pre-existing contractual arrangement	0.0	16.3	0.0	16.3
Total acquisition-related and integration costs	4.1	43.2	16.7	168.4
Other acquisitions
Business Acquisition [Line Items]
Total acquisition-related and integration costs	$ 0.0	$ 3.1	$ 0.2	$ 4.1

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479907/805-20-50-5

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