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Schedule II - Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
DescriptionBalance at beginning of yearCharged to costs and expenses
Deductions(1)
Balance at end of year
Year ended December 31, 2020   
Allowance for doubtful accounts
$5.1 1.0 (1.4)$4.7 
Workers’ compensation loss reserves
$16.2 2.9 (5.8)$13.3 
   
Year ended December 31, 2019
Allowance for doubtful accounts$4.8 3.7 (3.4)$5.1 
Workers’ compensation loss reserves
$17.4 3.3 (4.5)$16.2 
   
Year ended December 31, 2018   
Allowance for doubtful accounts$8.5 3.3 (7.0)$4.8 
Workers’ compensation loss reserves
$14.8 3.6 (1.0)$17.4 
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(1) Deductions from allowance for doubtful accounts include write-offs of uncollectible accounts receivable.
Deductions from workers’ compensation loss reserves include payments of claims and changes related to anticipated insurance and indemnification recoverie