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Accumulated Other Comprehensive Income (Loss)
 12 Months Ended
Dec. 31, 2023
Equity [Abstract]  
Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss)
The components of accumulated other comprehensive loss, net of taxes, were as follows for the years ended December 31, 2023 and 2022 (in millions):
20232022
Employee benefit plans:
Post-retirement plans(0.2)(0.3)
Non-qualified benefit plans— — 
Total employee benefit plans(0.2)(0.3)
Interest rate swap3.4 2.1 
Accumulated other comprehensive income (loss)$3.2 $1.8 
The changes in accumulated other comprehensive income (loss) by component for the years ended December 31, 2023, 2022, and 2021 were as follows (in millions, net of tax):
Employee Benefit PlansInterest Rate SwapTotal
Balance, January 1, 2021$(53.3)$(6.7)$(60.0)
Other comprehensive income (loss) before reclassifications, net of taxes of $0
(27.4)2.3 (25.1)
Amounts reclassified from accumulated other comprehensive income (loss), net of taxes of $0
2.8 1.6 4.4 
Balance, December 31, 2021$(77.9)$(2.8)$(80.7)
Other comprehensive income (loss) before reclassifications, net of taxes of $0
17.0 4.9 21.9 
Amounts reclassified from accumulated other comprehensive income (loss), net of taxes of $0
78.9 — 78.9 
Taxes on other comprehensive income (loss)$(18.3)$— $(18.3)
Balance, December 31, 2022$(0.3)$2.1 $1.8 
Other comprehensive income (loss) before reclassifications, net of taxes of $0
0.1 0.3 0.4 
Amounts reclassified from accumulated other comprehensive income (loss), net of taxes of $0
— 1.0 1.0 
Balance, December 31, 2023$(0.2)$3.4 $3.2 
The reclassifications of other comprehensive income (loss) components out of accumulated other comprehensive income (loss) for the years ended December 31, 2023, 2022, and 2021, were as follows (in millions):
202320222021
Cash flow hedges:
Unrealized interest rate derivative gain (loss)$0.3 $4.9 $2.3 
Reclassification adjustment to interest expense included in Net Income (Loss)(1.7)0.5 1.6 
Reclassification of interest rate derivative loss (gain) to interest and other income (expense), net included in Net Income (Loss)2.7 (0.5)— 
Employee benefit plans:
Actuarial gain (loss)0.1 17.0 (27.4)
Amortization of defined benefit pension items reclassified to net periodic pension cost:
Net loss1
— 1.9 2.8 
Amortization of prior service credit1
— 0.1 — 
Pension termination— 76.9 — 
Total before income tax$1.4 $100.8 $(20.7)
Income taxes related to other comprehensive income (loss)— (18.3)— 
Other comprehensive income (loss), net of tax$1.4 $82.5 $(20.7)
1 This accumulated other comprehensive income (loss) component is included in the computation of net periodic pension cost (refer to Note 15 – Employee Benefit Plans).