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Valuation And Qualifying Accounts
12 Months Ended
Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Valuation And Qualifying Accounts
Balance at
Beginning of
Year
Additions
Deductions (1)
Balance at
End of Year
Allowance for doubtful accounts, loan credit losses, and sales returns
Year ended December 31, 2019
$20.4  $46.9  $(45.9) $21.4  
Year ended December 31, 2018
$14.6  $46.0  $(40.2) $20.4  
Year ended December 31, 2017
$10.8  $36.1  $(32.3) $14.6  

(1)Primarily represents products returned.