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Accumulated Other Comprehensive Income (Loss) (Tables)
 12 Months Ended
Dec. 31, 2018
Equity [Abstract]  
Changes in accumulated comprehensive income (loss)
The components of and changes in accumulated other comprehensive income (loss) for the years ended December 31, 2018, 2017, and 2016 were as follows:
 
Cumulative Translation Adjustment
 
Pension and Postretirement Benefits
 
Total
Balance at January 1, 2016
$
(16.9
)
 
$
(13.1
)
 
$
(30.0
)
Currency translation
(13.9
)
 
—

 
(13.9
)
Pension and OPEB activity, net of tax
—

 
1.2

 
1.2

Balance at December 31, 2016
(30.8
)
 
(11.9
)
 
(42.7
)
Currency translation
19.2

 
—

 
19.2

Pension and OPEB activity, net of tax
—

 
5.6

 
5.6

Balance at December 31, 2017
(11.6
)
 
(6.3
)
 
(17.9
)
Currency translation
(9.7
)
 
—

 
(9.7
)
Pension and OPEB activity, net of tax
—

 
(13.3
)
 
(13.3
)
Balance at December 31, 2018
$
(21.3
)
 
$
(19.6
)
 
$
(40.9
)