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Accumulated Other Comprehensive Income
 6 Months Ended
Jun. 30, 2020
Equity [Abstract]  
Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income
The following table sets forth the after-tax components of accumulated other comprehensive income and changes thereto recorded during the six months ended June 30, 2020:
Foreign Currency Translation
Adjustment		Prior Service
Credit (Cost) Associated
with
Postretirement
Plans		Total Accumulated Other Comprehensive Income
 (Dollars in millions)
December 31, 2019$(4.3) $35.9  $31.6  
Reclassification from other comprehensive income to earnings—  (4.4) (4.4) 
Current period change(0.7) —  (0.7) 
June 30, 2020$(5.0) $31.5  $26.5  
Postretirement health care and life insurance benefits reclassified from other comprehensive income to earnings of $2.2 million during both the three months ended June 30, 2020 and 2019 and $4.4 million during both the six months ended June 30, 2020 and 2019 are included in “Net periodic benefit costs, excluding service cost” in the unaudited condensed consolidated statements of operations.