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Valuation and Qualifying Accounts and Reserves
12 Months Ended
Dec. 31, 2023
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, 2021, 2022 and 2023
 
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
 Balance at
End of Year
Allowances for doubtful accounts receivable:  
Year 2021$10.6 $2.0 $(2.0)$10.6 
Year 2022$10.6 $7.2 $(3.5)$14.3 
Year 2023$14.3 $(0.2)$(2.5)$11.6 
Allowance for credit memos, returns and cash discounts:  
Year 2021$31.9 $296.5 $(293.7)$34.7 
Year 2022$34.7 $365.1 $(355.7)$44.1 
Year 2023$44.1 $365.5 $(371.4)$38.2 
Valuation allowance on deferred tax assets:  
Year 2021$29.5 $3.1 $— $32.6 
Year 2022$32.6 $(0.4)$— $32.2 
Year 2023$32.2 $5.2 $— $37.4