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Schedule II - Valuation and Qualifying Accounts (Notes)
12 Months Ended
Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule of Valuation and Qualifying Accounts
Schedule II - Valuation and Qualifying Accounts
($ in millions)
Balance at
beginning of
period
Charged
to costs
and expenses
Deductions (1)
Balance at
end of
period
For the year ended December 31, 2018
 
 
 
 
Allowances deducted from assets:
 
 
 
 
Deferred tax asset valuation allowance
$
20.9

$
(3.0
)
$
(1.9
)
$
16.0

Allowance for doubtful accounts
0.5

0.7

0.8

2.0

Total allowances deducted from assets
$
21.4

$
(2.3
)
$
(1.1
)
$
18.0

 
 
 
 
 
For the year ended December 31, 2017
 
 
 
 
Allowances deducted from assets:
 
 
 
 
Deferred tax asset valuation allowance
$
18.7

$
2.5

$
(0.3
)
$
20.9

Allowance for doubtful accounts
0.4

(0.2
)
0.3

0.5

Total allowances deducted from assets
$
19.1

$
2.3

$

$
21.4

 
 
 
 
 
For the year ended December 31, 2016
 
 
 
 
Allowances deducted from assets:
 
 
 
 
Deferred tax asset valuation allowance
$
20.1

$
(1.3
)
$
(0.1
)
$
18.7

Allowance for doubtful accounts
0.6


(0.2
)
0.4

Total allowances deducted from assets
$
20.7

$
(1.3
)
$
(0.3
)
$
19.1

 
 
 
 
 
__________________________
(1)
Includes accounts receivable written off, the write-off or write-down of valuation allowances, and translation adjustments.