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Revenue Recognition Contract Assets and Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue Recognition [Abstract]
Receivables from contracts with customers, net	$ 595.0	$ 662.0	$ 706.7
Contract Asset (Current)	25.7	26.7	28.2
Contract Asset (Long-Term)	10.2	7.0	17.4
Contract Liability (Current)	32.5	32.6	31.6
Contract Liability (Long-Term)	56.0	57.7	61.9
Revenue amounts included in contract liability at the beginning of the period	31.0	35.1	29.8
Revenue for performance obligations satisfied in previous periods	19.0	9.3	$ 23.6
Contract assets reclassified to receivables	$ 26.1	$ 30.0
Vehicle Care Program, contract term	5 years

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