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Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2020
Equity [Abstract] |
Schedule of Components of Accumulated Other Comprehensive Income (Loss), Net of Taxes | The components of accumulated other comprehensive loss, net of taxes, were as follows for the years ended December 31, 2020 and 2019 (in millions):
| 2020 |  | 2019
Employee benefit plans: |  |  |
Pension plans | $ | (48.9) |  |  | $ | (47.4) |
Post-retirement plans | (3.6) |  |  | 0.2 |
Non-qualified benefit plans | (0.8) |  |  | (0.8) |
Total employee benefit plans | (53.3) |  |  | (48.0) |
Interest rate swap | (6.7) |  |  | (0.8) |
Accumulated other comprehensive income (loss) | $ | (60.0) |  |  | $ | (48.8) |
The changes in accumulated other comprehensive income (loss) by component for the years ended December 31, 2020, 2019 and 2018 were as follows (in millions, net of tax):
| Employee Benefit Plans |  | Interest Rate Swap |  | Total
Balance, January 1, 2018 | $ | (44.2) |  |  | $ | 1.9 |  |  | $ | (42.3) |
Other comprehensive income (loss) before reclassifications, net of taxes of $0 | (4.9) |  |  | 1.0 |  |  | (3.9) |
Amounts reclassified from accumulated other comprehensive income (loss), net of taxes of $0 | 3.4 |  |  | — |  |  | 3.4 |
Impact of adoption of ASU 2018-02 | (9.5) |  |  | 0.4 |  |  | (9.1) |
Balance, December 31, 2018 | $ | (55.2) |  |  | $ | 3.3 |  |  | $ | (51.9) |
Other comprehensive income (loss) before reclassifications, net of taxes of $0 | 5.3 |  |  | (4.0) |  |  | 1.3 |
Amounts reclassified from accumulated other comprehensive income (loss), net of taxes of $0 | 1.9 |  |  | (0.1) |  |  | 1.8 |
Balance, December 31, 2019 | $ | (48.0) |  |  | $ | (0.8) |  |  | $ | (48.8) |
Other comprehensive income (loss) before reclassifications, net of taxes of $0 | (7.7) |  |  | (6.9) |  |  | (14.6) |
Amounts reclassified from accumulated other comprehensive income (loss), net of taxes of $0 | 2.4 |  |  | 1.0 |  |  | 3.4 |
Balance, December 31, 2020 | $ | (53.3) |  |  | $ | (6.7) |  |  | $ | (60.0) |
Schedule of Reclassification out of Accumulated Other Comprehensive Income (Loss) | The reclassifications of other comprehensive income (loss) components out of accumulated other comprehensive income (loss) for the years ended December 31, 2020, 2019 and 2018 were as follows (in millions):
|  | 2020 |  | 2019 |  | 2018
Unrealized interest rate hedging gain (loss) |  | $ | (6.9) |  |  | $ | (4.0) |  |  | $ | 1.0 |
Actuarial loss |  | (7.7) |  |  | 5.3 |  |  | (4.9) |
Impact of reclassification adjustment to interest expense included in Net Income (Loss) |  | 1.0 |  |  | (0.1) |  |  | — |
Amortization of defined benefit pension items reclassified to net periodic pension cost: |  |  |  |  |  |
Net loss* |  | 2.5 |  |  | 4.0 |  |  | 4.6 |
Prior service cost* |  | (0.1) |  |  | — |  |  | — |
Prior service credit* |  | — |  |  | (0.7) |  |  | (0.7) |
Curtailment (gain)/loss* |  | — |  |  | (1.4) |  |  | (0.6) |
Settlement (gain)/loss* |  | — |  |  | — |  |  | 0.1 |
Total before income tax |  | $ | (11.2) |  |  | $ | 3.1 |  |  | $ | (0.5) |
Income taxes |  | — |  |  | — |  |  | — |
Other comprehensive income (loss), net of tax |  | $ | (11.2) |  |  | $ | 3.1 |  |  | $ | (0.5) |
* This accumulated other comprehensive income (loss) component is included in the computation of net periodic pension cost (refer to Note 17).

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