Store Divestitures (Details) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021 USD ($) store	Dec. 31, 2021 USD ($) store	Dec. 31, 2020 USD ($) store franchises	Dec. 31, 2019 USD ($) store
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposal | $	$ 10.6	$ 13.3	$ 2.5	$ 29.7
Number of Franchises Terminated | franchises			1
Dealerships Divested
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of businesses divested	1	3	1	8
Collision Centers Divested [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of businesses divested	17	18	2	2