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Accumulated Other Comprehensive Income (Loss)
 12 Months Ended
Dec. 31, 2019
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]  
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive (Loss) Income
The following table sets forth the after-tax components of accumulated other comprehensive (loss) income and changes thereto:
 
Foreign
Currency
Translation
Adjustment
 
Net
Actuarial Loss
Associated with
Postretirement
Plans and
Workers’
Compensation
Obligations
 
Prior Service
Credit (Cost) Associated
with
Postretirement
Plans
 
Cash Flow
Hedges
 
Total
Accumulated
Other
Comprehensive (Loss)
Income
 
(Dollars in millions)
Predecessor Company
 
 
 
 
 
 
 
 
 
December 31, 2016
$
(148.2
)
 
$
(256.3
)
 
$
21.7

 
$
(94.2
)
 
$
(477.0
)
Reclassification from other comprehensive income to earnings
—

 
5.8

 
(1.4
)
 
18.6

 
23.0

Current period change
5.5

 
—

 
—

 
—

 
5.5

Fresh start reporting adjustment
142.7

 
250.5

 
(20.3
)
 
75.6

 
448.5

April 1, 2017
$
—

 
$
—

 
$
—

 
$
—

 
$
—

Successor Company
 
 
 
 
 
 
 
 
 
Current period change
1.4

 
—

 
—

 
—

 
1.4

December 31, 2017
1.4

 
—

 
—

 
—

 
1.4

Current period change
(5.9
)
 
—

 
44.6

 
—

 
38.7

December 31, 2018
(4.5
)
 
—

 
44.6

 
—

 
40.1

Reclassification from other comprehensive income to earnings
—

 
—

 
(8.7
)
 
—

 
(8.7
)
Current period change
0.2

 
—

 
—

 
—

 
0.2

December 31, 2019
$
(4.3
)
 
$
—

 
$
35.9

 
$
—

 
$
31.6


The components of accumulated other comprehensive income 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 such, there were no amounts reclassified out of “Accumulated other comprehensive income” during the year ended December 31, 2018 or the period April 2 through December 31, 2017. The following table provides additional information regarding items reclassified out of “Accumulated other comprehensive income” into earnings during the periods presented below:
 
 
Amount reclassified from accumulated other comprehensive loss (1)
 
 
 
Successor
Predecessor
 
Details about accumulated other comprehensive loss components
 
Year Ended December 31, 2019
January 1 through April 1, 2017
 
Affected line item in the 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
Workers’ compensation amortization
 
—

2.7

 
Net periodic benefit costs, excluding service cost
 
 
—

(9.1
)
 
Total before income taxes
 
 
—

3.3

 
Income tax benefit
 
 
$
—

$
(5.8
)
 
Total after income taxes
 
 
 
 
 
 
Prior service credit (cost) associated with postretirement plans:
 
 
 
 
 
Postretirement health care and life insurance benefits
 
$
8.7

$
2.3

 
Net periodic benefit costs, excluding service cost
Defined benefit pension plans
 
—

(0.1
)
 
Net periodic benefit costs, excluding service cost
 
 
8.7

2.2

 
Total before income taxes
 
 
—

(0.8
)
 
Income tax provision
 
 
$
8.7

$
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 consolidated statements of operations.
Comprehensive loss differed from net loss by the amount of unrealized gain or loss resulting from valuation changes of the Company’s cash flow hedges (see Note 9. “Derivatives and Fair Value Measurements” for information related to the Company’s cash flow hedges), the change in actuarial loss and prior service cost of postretirement plans and workers’ compensation obligations (see Note 17. “Postretirement Health Care and Life Insurance Benefits,” Note 18. “Pension and Savings Plans” and Note 6. “Discontinued Operations” for information related to the Company’s postretirement and pension plans) and foreign currency translation adjustment related to the Company’s investments in Middlemount, whose functional currency is the Australian dollar. The values of the Company’s cash flow hedging instruments were primarily affected by the U.S. dollar/Australian dollar exchange rate and changes in the prices of certain coal and diesel fuel products.