Valuation and Qualifying Accounts and Reserves

12 Months Ended

Dec. 31, 2020

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Valuation and Qualifying Accounts and Reserves

Valuation and Qualifying Accounts and Reserves for the Years Ended December 31, 2018, 2019 and 2020

Reserves deducted in the balance sheet from the assets to which they apply (in millions):

	Balance at Beginning of Year		Additions / (Reversals) Charged to Costs and Expenses		Deductions		Acquisitions		Balance at End of Year
Allowances for doubtful accounts receivable:
Year 2018	$	4.6	$	—	$	(1.4)	$	1.6	$	4.8
Year 2019	$	4.8	$	3.4	$	(0.5)	$	—	$	7.7
Year 2020(a)	$	9.0	$	5.0	$	(1.7)	$	0.2	$	12.5
Allowance for credit memos, returns and cash discounts:
Year 2018	$	50.5	$	278.0	$	(293.5)	$	0.1	$	35.1
Year 2019	$	35.1	$	299.1	$	(298.2)	$	—	$	36.0
Year 2020	$	36.0	$	286.2	$	(287.8)	$	—	$	34.4
Valuation allowance on deferred tax assets:
Year 2018	$	19.4	$	0.7	$	—	$	1.7	$	21.8
Year 2019	$	21.8	$	7.2	$	—	$	—	$	29.0
Year 2020	$	29.0	$	5.2	$	—	$	—	$	34.2

 (a) The cumulative effect of the adoption of ASC 326 resulted in a $1.3 million increase to the opening balance.