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Valuation and Qualifying Accounts and Reserves
 12 Months Ended
Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Valuation and Qualifying Accounts and Reserves Valuation and Qualifying Accounts and Reserves
 (amounts in millions)
 
Balance at
beginning of
period
 
(Charges) Income
 
Deductions from (increases to)
reserves and other (1)
 
Balance at
end of period
Reserves against accounts receivable:
 
 
 
 
 
 
 
 
2018
 
$
(8.2
)
 
$
(0.9
)
 
$
1.4

 
$
(7.7
)
2017
 
(10.9
)
 
2.1

 
0.6

 
(8.2
)
2016
 
(6.1
)
 
(2.9
)
 
(1.9
)
 
(10.9
)

 (amounts in millions)
 
Balance at
beginning of
period
 
(Charges) Income
 
Deductions from (increases to)
reserves and other (1)
 
Balance at
end of period
Valuation allowances against deferred tax assets:
 
 
 
 
 
 
 
 
2018
 
$
(391.7
)
 
$
(76.1
)
 
$
(7.4
)
 
$
(475.2
)
2017
 
(383.3
)
 
(10.9
)
 
2.4

 
(391.7
)
2016
 
(303.8
)
 
(68.4
)
 
(11.0
)
 
(383.3
)
(1) 
Other activity consists primarily of currency translation effects.