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Accumulated Other Comprehensive Income | 3 Months Ended
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Mar. 31, 2018
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 three months ended March 31, 2018:
|  | Foreign Currency Translation Adjustment |  | Total Accumulated Other Comprehensive Income
|  | (Dollars in millions)
| December 31, 2017 | $ | 1.4 |  |  | $ | 1.4 |
| Current period change | (0.8 | ) |  | (0.8 | )
| March 31, 2018 | $ | 0.6 |  |  | $ | 0.6 |
The components of accumulated other comprehensive income (loss) related to postretirement plans and workers’ compensation obligations and cash flow hedges related to Predecessor periods were eliminated in accordance with fresh start reporting as described in Note 2. “Emergence from the Chapter 11 Cases and Fresh Start Reporting” in the Company's Annual Report on Form 10-K for the year ended December 31, 2017. The following table provides additional information regarding items reclassified out of “Accumulated other comprehensive income (loss)” into earnings during the period presented below:
|  | Amount reclassified from accumulated other comprehensive income (loss) (1) |  |
|  | Predecessor |  |
Details about accumulated other comprehensive income (loss) components |  | Three Months Ended March 31, 2017 |  | Affected line item in the unaudited condensed consolidated statement of operations
|  | (Dollars in millions) |  |
Net actuarial loss associated with postretirement plans and workers’ compensation obligations: |  |  |  |
Postretirement health care and life insurance benefits |  | $ | (5.5 | ) |  | Net periodic benefit costs, excluding service cost
Defined benefit pension plans |  | (6.3 | ) |  | Net periodic benefit costs, excluding service cost
Insignificant items |  | 2.7 |  |  |
|  | (9.1 | ) |  | Total before income taxes
|  | 3.3 |  |  | Income tax benefit
|  | $ | (5.8 | ) |  | Total after income taxes
Prior service credit associated with postretirement plans: |  |  |  |
Postretirement health care and life insurance benefits |  | $ | 2.3 |  |  | Net periodic benefit costs, excluding service cost
Defined benefit pension plans |  | (0.1 | ) |  | Net periodic benefit costs, excluding service cost
|  | 2.2 |  |  | Total before income taxes
|  | (0.8 | ) |  | Income tax provision
|  | $ | 1.4 |  |  | Total after income taxes
Cash flow hedges: |  |  |  |
Foreign currency cash flow hedge contracts |  | $ | (16.6 | ) |  | Operating costs and expenses
Fuel and explosives commodity swaps |  | (11.0 | ) |  | Operating costs and expenses
Insignificant items |  | (0.1 | ) |  |
|  | (27.7 | ) |  | Total before income taxes
|  | 9.1 |  |  | Income tax benefit
|  | $ | (18.6 | ) |  | Total after income taxes
(1) | Presented as gains (losses) 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
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- References No definition available. + Details
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