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Accumulated Other Comprehensive Income | 6 Months Ended
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Jun. 30, 2021
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 six months ended June 30, 2021:
| Foreign Currency Translation Adjustment |  |  |  | Prior Service Credit Associated with Postretirement Plans |  |  |  |  |  | Total Accumulated Other Comprehensive Income
| (Dollars in millions)
December 31, 2020 | $ | 1.8 |  |  |  |  | $ | 204.0 |  |  |  |  |  |  | $ | 205.8 |
Reclassification from other comprehensive income to earnings | — |  |  |  |  | (22.0) |  |  |  |  |  |  | (22.0) |
Current period change | (0.4) |  |  |  |  | — |  |  |  |  |  |  | (0.4) |
June 30, 2021 | $ | 1.4 |  |  |  |  | $ | 182.0 |  |  |  |  |  |  | $ | 183.4 |
Postretirement health care and life insurance benefits reclassified from other comprehensive income to earnings of $11.0 million and $2.2 million during the three months ended June 30, 2021 and 2020, respectively, and $22.0 million and $4.4 million during the six months ended June 30, 2021 and 2020, respectively, are included in “Net periodic benefit (credit) costs, excluding service cost” in the unaudited condensed consolidated statements of operations.

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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