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Business Combinations (Intangible Assets) (Details) - USD ($) $ in Millions	Mar. 20, 2023	Jan. 03, 2023
IAA
Business Acquisition [Line Items]
Preliminary fair value at acquisition	$ 2,712.1
Weighted average amortization period	13 years 4 months 24 days
IAA \| Software under development
Business Acquisition [Line Items]
Preliminary fair value at acquisition	$ 6.8
IAA \| Customer relationships
Business Acquisition [Line Items]
Preliminary fair value at acquisition	$ 2,293.5
Weighted average amortization period	15 years
IAA \| Developed technology
Business Acquisition [Line Items]
Preliminary fair value at acquisition	$ 245.2
Weighted average amortization period	4 years
IAA \| Trade names and trademarks
Business Acquisition [Line Items]
Preliminary fair value at acquisition	$ 166.6
Weighted average amortization period	5 years
VeriTread
Business Acquisition [Line Items]
Preliminary fair value at acquisition		$ 14.7
Weighted average amortization period		5 years 10 months 24 days
VeriTread \| Customer relationships
Business Acquisition [Line Items]
Preliminary fair value at acquisition		$ 7.2
Weighted average amortization period		5 years
VeriTread \| Software and technology assets
Business Acquisition [Line Items]
Preliminary fair value at acquisition		$ 7.1
Weighted average amortization period		7 years
VeriTread \| Trade names and trademarks
Business Acquisition [Line Items]
Preliminary fair value at acquisition		$ 0.4
Weighted average amortization period		2 years