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Accumulated Other Comprehensive Loss | 12 Months Ended
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Dec. 31, 2020
Equity [Abstract] |
Accumulated Other Comprehensive Loss | 15. Accumulated Other Comprehensive Loss The following tables set forth the changes in the balance of accumulated other comprehensive loss, net of tax, by component:
|  | Benefit Plans |  | Currency Translation Adjustments |  | Total
|  | (Dollars in millions)
At December 31, 2018 |  | $ | (6.0) |  |  | $ | (7.1) |  |  | $ | (13.1) |
Other comprehensive loss before reclassifications / adjustments |  | — |  |  | (0.6) |  |  | (0.6) |
Retirement benefit plans funded status adjustment |  | (0.7) |  |  | — |  |  | (0.7) |
Net current period change in accumulated other comprehensive loss |  | (0.7) |  |  | (0.6) |  |  | (1.3) |
At December 31, 2019 |  | $ | (6.7) |  |  | $ | (7.7) |  |  | $ | (14.4) |
Other comprehensive loss before reclassifications / adjustments |  | 0.1 |  |  | (1.2) |  |  | (1.1) |
Retirement benefit plans funded status adjustment |  | (1.6) |  |  | — |  |  | (1.6) |
Net current period change in accumulated other comprehensive loss |  | (1.5) |  |  | (1.2) |  |  | (2.7) |
At December 31, 2020 |  | $ | (8.2) |  |  | $ | (8.9) |  |  | $ | (17.1) |
The tax benefit associated with the Company's benefit plans as of December 31, 2020 and 2019 was $2.4 million and $2.1 million, respectively. The (decrease) increase in net income due to reclassification adjustments from accumulated other comprehensive income were as follows(1):
|  | December 31,
| 2020 |  | 2019 |  | 2018
| (Dollars in millions)
Recognition of accumulated currency translation loss upon sale of equity method investment in VISA SunCoke |  | $ | — |  |  | $ | — |  |  | $ | (9.0) |
Amortization of benefit plans to net income:(2) |  |  |  |  |  |
Actuarial loss |  | $ | (0.6) |  |  | $ | (0.6) |  |  | $ | (0.6) |
Prior service benefit |  | 0.5 |  |  | 0.6 |  |  | 0.7 |
Total, net of tax(3) |  | $ | (0.1) |  |  | $ | — |  |  | $ | (8.9) |
(1)Amounts in parentheses indicate debits to net income. (2)These accumulated other comprehensive (income) loss components are included in the computation of postretirement benefit plan expense (benefit) and included in interest expense, net on the Consolidated Statements of Operations. See Note 10. (3)The related tax cost (benefit) was immaterial for all years presented.

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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=120395209&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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