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Components of Accumulated Other Comprehensive Loss | 12 Months Ended
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Dec. 31, 2019
Equity [Abstract] |
Components of Accumulated Other Comprehensive Loss | NOTE 20. COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE LOSS The following tables detail the changes in our Accumulated Other Comprehensive Loss (AOCL) on our Consolidated Balance Sheets for the years ended December 31, 2019 and 2018, net of tax.
|  |  |  |  |  | Pension Plans |  |  | OPEB |  |  |  |  |
(in thousands) |  | Gains and losses on cash flow hedging |  |  | Actuarial Loss |  |  | Prior Service Cost |  |  | Actuarial Loss |  |  | Prior Service Credit |  |  | Total |
Balance, December 31, 2017 |  | $ | (705 | ) |  | $ | 100,165 |  |  | $ | 446 |  |  | $ | 7,491 |  |  | $ | (12,546 | ) |  | $ | 94,851 |
Net loss (gain) arising during the period |  |  | 3,062 |  |  |  | 17,268 |  |  |  | — |  |  |  | (1,554 | ) |  |  | — |  |  |  | 18,776 |
Amounts reclassified from AOCL to earnings |  |  | (647 | ) |  |  | (12,276 | ) |  |  | (137 | ) |  |  | (970 | ) |  |  | 6,569 |  |  |  | (7,461 | )
Amounts reclassified from AOCL to accumulated deficit1 |  |  | (150 | ) |  |  | 23,692 |  |  |  | 95 |  |  |  | 2,302 |  |  |  | (2,674 | ) |  |  | 23,265 |
Balance, December 31, 2018 |  |  | 1,560 |  |  |  | 128,849 |  |  |  | 404 |  |  |  | 7,269 |  |  |  | (8,651 | ) |  |  | 129,431 |
Net loss (gain) arising during the period |  |  | 19,824 |  |  |  | (2,081 | ) |  |  | — |  |  |  | 5,917 |  |  |  | — |  |  |  | 23,660 |
Amounts reclassified from AOCL to earnings |  |  | (1,384 | ) |  |  | (9,988 | ) |  |  | (156 | ) |  |  | (749 | ) |  |  | 6,545 |  |  |  | (5,732 | )
Balance, December 31, 2019 |  | $ | 20,000 |  |  | $ | 116,780 |  |  | $ | 248 |  |  | $ | 12,437 |  |  | $ | (2,106 | ) |  | $ | 147,359 |
1 | Reclassifications between AOCL and accumulated deficit during 2018 relate to certain tax effects of tax law changes on pension and other postretirement employee benefits and a cash flow hedge upon adoption of ASU 2018-02 during 2018.
See Note 15: Derivative Instruments and Note 19: Savings Plans, Pension and Other Postretirement Employee Benefits for additional information.

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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 + Details
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