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Supplemental Accumulated Other Comprehensive Loss Information (Tables)
 6 Months Ended
Jun. 30, 2017
Equity [Abstract]  
Changes in Accumulated Other Comprehensive Loss, by Component
Changes in accumulated other comprehensive loss, by component, are presented below:
 
Benefit Plans
 
Currency Translation Adjustments
 
Total
 
 
 
 
 
 
 
(Dollars in millions)
At December 31, 2016
$
(4.8
)
 
$
(14.2
)
 
$
(19.0
)
Other comprehensive income
—

 
(0.2
)
 
(0.2
)
At June 30, 2017
$
(4.8
)
 
$
(14.4
)
 
$
(19.2
)
Reclassification Adjustments from Accumulated Other Comprehensive Loss
Reclassifications out of the accumulated other comprehensive loss were as follows:(1) 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2017
 
2016
 
2017
 
2016
 
 
 
 
 
 
 
 
 
(Dollars in millions)
Amortization of postretirement benefit plan items to net income:
 
 
 
 
 
 
 
Actuarial loss(2)
$
0.2

 
$
0.2

 
$
0.4

 
$
0.4

Prior service benefit(2)
(0.2
)
 
(0.2
)
 
(0.4
)
 
(0.4
)
Total expense before taxes
—

 
—

 
—

 
—

Less income tax benefit
—

 
—

 
—

 
—

Total expense, net of tax
$
—

 
$
—

 
$
—

 
$
—


(1)
Amounts in parentheses indicate credits to net income.
(2)
These accumulated other comprehensive (income) loss components are included in the computation of postretirement benefit plan expense (benefit). See Note 7.