The following table shows the changes in accumulated other comprehensive loss by component. Amounts in parentheses indicate debits. | | | | | | | | | | | | | | | | | | | | | (In millions) | Pension Benefits | | Other Benefits | | Gain on Cash Flow Hedge | | Workers Compensation | | Total | Balance as of December 31, 2018 | $ | (132 | ) | | $ | (23 | ) | | $ | 2 |
| | $ | 9 |
| | $ | (144 | ) | Other comprehensive loss before reclassifications, net of tax of $0 | (1 | ) | | — |
| | — |
| | — |
| | (1 | ) | Amounts reclassified from accumulated other comprehensive loss: | | | | | | | | | | Amortization – prior service credit(a) | (11 | ) | | — |
| | — |
| | — |
| | (11 | ) | – actuarial loss(a) | 4 |
| | — |
| | — |
| | — |
| | 4 |
| – settlement loss(a) | — |
| | — |
| | — |
| | — |
| | — |
| Other | — |
| | — |
| | — |
| | (1 | ) | | (1 | ) | Tax effect | 2 |
| | — |
| | — |
| | — |
| | 2 |
| Other comprehensive loss | (6 | ) | | — |
| | — |
| | (1 | ) | | (7 | ) | Balance as of March 31, 2019 | $ | (138 | ) | | $ | (23 | ) | | $ | 2 |
| | $ | 8 |
| | $ | (151 | ) |
| | | | | | | | | | | | | | | | | | | | | (In millions) | Pension Benefits | | Other Benefits | | Gain on Cash Flow Hedge | | Workers Compensation | | Total | Balance as of December 31, 2019 | $ | (212 | ) | | $ | (116 | ) | | $ | 1 |
| | $ | 7 |
| | $ | (320 | ) | Other comprehensive loss before reclassifications, net of tax of ($1) | (2 | ) | | (2 | ) | | — |
| | — |
| | (4 | ) | Amounts reclassified from accumulated other comprehensive loss: | | | | | | | | | | Amortization – prior service credit(a) | (11 | ) | | — |
| | — |
| | — |
| | (11 | ) | – actuarial loss(a) | 8 |
| | 1 |
| | — |
| | — |
| | 9 |
| – settlement loss(a) | — |
| | — |
| | — |
| | — |
| | — |
| Other | — |
| | — |
| | — |
| | (1 | ) | | (1 | ) | Tax effect | 1 |
| | — |
| | — |
| | — |
| | 1 |
| Other comprehensive loss | (4 | ) | | (1 | ) | | — |
| | (1 | ) | | (6 | ) | Balance as of March 31, 2020 | $ | (216 | ) | | $ | (117 | ) | | $ | 1 |
| | $ | 6 |
| | $ | (326 | ) |
(a) These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost. See Note 21.
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