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Accumulated Other Comprehensive Income
 3 Months Ended
Mar. 31, 2022
Equity [Abstract]  
Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income
The following table sets forth the after-tax components of accumulated other comprehensive income and changes thereto recorded during the three months ended March 31, 2022:
Foreign Currency Translation
Adjustment		Prior Service
Credit Associated
with
Postretirement
Plans		Total Accumulated Other Comprehensive Income
 (Dollars in millions)
December 31, 2021$0.8 $297.1 $297.9 
Reclassification from other comprehensive income to earnings— (13.4)(13.4)
Current period change1.9 — 1.9 
March 31, 2022$2.7 $283.7 $286.4 
Postretirement health care and life insurance benefits reclassified from other comprehensive income to earnings of $13.4 million and $11.0 million during the three months ended March 31, 2022 and 2021, respectively, are included in “Net periodic benefit credit, excluding service cost” in the unaudited condensed consolidated statements of operations.