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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
(Amounts in millions)
 
Column AColumn BColumn CColumn DColumn E
DescriptionBalance
at
Beginning
of Period		Additions
(Credited)
to Cost
and
Expenses		DeductionsBalance
at End of
Period
Year ended December 31, 2020    
Allowance for doubtful receivables$26.8 
1
$17.1 $1.9 
2
$42.0 
Tax valuation allowance$16.8 $2.5 $1.2 $18.1 
Year ended December 31, 2019    
Allowance for doubtful receivables$20.2 $2.8 $(.5)
2
$23.5 
Tax valuation allowance$13.2 $1.5 $(2.1)$16.8 
Year ended December 31, 2018    
Allowance for doubtful receivables$4.9 $16.7 $1.4 
2
$20.2 
Tax valuation allowance$24.2 $(7.8)$3.2 $13.2 

1Beginning balance adjusted for implementation of ASU 2016-13 "Financial Instruments-Credit Losses" (Topic 326).
2Uncollectible accounts charged off, net of recoveries.