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Employee Benefit Plans (Tables)
12 Months Ended
Dec. 31, 2022
Retirement Benefits [Abstract]  
Schedule of reconciliation of the beginning and ending balances of the projected benefit obligation
A reconciliation of the beginning and ending balances of the projected benefit obligation is presented below (in millions):
 Year Ended December 31,
 20222021
Projected benefit obligation at the beginning of the year$67.1 $68.6 
Service cost3.1 3.4 
Interest cost1.2 0.9 
Benefits paid(0.2)— 
Net actuarial gain(19.7)(5.8)
Projected benefit obligation at the end of the year$51.5 $67.1 
Amount included in Other current liabilities(1)
$19.5 $18.2 
Amount included in Other non-current liabilities$32.0 $48.9 
(1)This amount represents the benefit obligation due to participants who are eligible to retire and whose benefit payments could commence within one year of the respective balance sheet date.
Schedule of weighted-average assumptions used to measure the SERP obligation
The following weighted average assumptions were used to measure the SERP obligation:
Year Ended December 31,
20222021
Discount rate4.95 %2.05 %
Salary increases4.00 %4.00 %
Lump-sum interest rate5.00 %2.75 %
Schedule of components of net periodic pension cost recognized
The components of net periodic pension cost recognized in our consolidated statements of operations consisted of the following (in millions):
Year Ended December 31,
202220212020
Service cost$3.1 $3.4 $2.8 
Interest cost1.2 0.9 1.3 
Amortization of prior service cost0.7 0.7 1.3 
Total$5.0 $5.0 $5.4 
Schedule of amounts recognized in other comprehensive (loss) income
Amounts related to the SERP that have been recognized in other comprehensive (loss) income are as follows (in millions):
Year Ended December 31,
202220212020
Net actuarial gain (loss) $19.7 $5.8 $(8.4)
Prior service cost0.7 0.7 1.3 
Total recognized in other comprehensive (loss) income20.4 6.5 (7.1)
Tax (expense) benefit (1.1)(0.3)0.4 
Total, net of tax$19.3 $6.2 $(6.7)
Schedule of amounts included in accumulated other comprehensive loss
The table below presents amounts related to the SERP included in accumulated other comprehensive loss that have not yet been recognized as a component of net periodic pension cost in our consolidated statements of operations (in millions):
Year Ended December 31,
202220212020
Net actuarial (gain) loss $(21.7)$(2.0)$3.8 
Prior service cost0.6 1.3 2.0 
Total included in accumulated other comprehensive loss(21.1)(0.7)5.8 
Tax expense2.3 1.2 0.9 
Total, net of tax$(18.8)$0.5 $6.7 
Schedule of future estimated benefit payments, based on current assumptions
Future estimated benefit payments, based on current assumptions, including election of lump-sum distributions and expected future service, are as follows (in millions):
Year Ended December 31, 
2023$19.5 
202412.8 
20255.3 
2026— 
2027— 
Thereafter30.1 
Total$67.7