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Receivables, net (Notes)
3 Months Ended
Mar. 31, 2022
Receivables, Net, Current [Abstract]  
Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Receivables
Receivables consist of:
March 31, 2022December 31, 2021
Trade accounts receivable$163.6 $154.1 
Allowance for current expected credit losses(1.3)(1.4)
Unbilled receivables8.5 7.2 
Taxes receivable0.4 6.1 
Other1.1 1.4 
$172.3 $167.4