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Schedule II - Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II - Valuation and Qualifying Accounts
SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS


(in millions)
Balance
Beginning
of Year
 
Charged
to
Expense
 
Deductions
 
Balance
End of
Year
Allowance for doubtful accounts:
 
 
 
 
 
 
 
2018
$
3.6

 
$
3.0

 
$
(2.6
)
 
$
4.0

2017
3.5

 
1.8

 
(1.7
)
 
3.6

2016
3.8

 
1.5

 
(1.8
)
 
3.5



(in millions)
Balance
Beginning
of Year
 
Additions
 
Deductions
 
Balance
End of
Year
Deferred income tax asset valuation allowance:
 
 
 
 
 
 
 
2018
$
0.2

 
$
—

 
$
—

 
$
0.2

2017
0.4

 
—

 
(0.2
)
 
0.2

2016
0.9

 
—

 
(0.5
)
 
0.4