Valuation and Qualifying Accounts and Reserves (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allowances for doubtful accounts receivable:
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 7.7	$ 4.8	$ 4.6
Additions / (Reversals) Charged to Costs and Expenses	5.0	3.4	0.0
Deductions	(1.7)	(0.5)	(1.4)
Acquisitions	0.2	0.0	1.6
Balance at End of Year	12.5	7.7	4.8
Allowances for doubtful accounts receivable: | Cumulative Effect, Period of Adoption, Adjusted Balance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	9.0
Balance at End of Year		9.0
Allowances for doubtful accounts receivable: | Cumulative Effect, Period of Adoption, Adjustment
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	1.3
Balance at End of Year		1.3
Allowance for credit memos, returns and cash discounts:
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	36.0	35.1	50.5
Additions / (Reversals) Charged to Costs and Expenses	286.2	299.1	278.0
Deductions	(287.8)	(298.2)	(293.5)
Acquisitions	0.0	0.0	0.1
Balance at End of Year	34.4	36.0	35.1
Valuation allowance on deferred tax assets:
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	29.0	21.8	19.4
Additions / (Reversals) Charged to Costs and Expenses	5.2	7.2	0.7
Deductions	0.0	0.0	0.0
Acquisitions	0.0	0.0	1.7
Balance at End of Year	$ 34.2	$ 29.0	$ 21.8