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Other Postretirement Benefit Plans (Tables) - Accrued postretirement liability
12 Months Ended
Dec. 31, 2021
Post Retirement Benefit Plans  
Schedule of Defined Benefit Plans Disclosures
The following tables summarize the net periodic benefit cost information and the related assumptions used to measure the net periodic benefit cost for the years ended December 31:
 202120202019
Components of net periodic credit:
Service cost$0.2 $0.2 $0.2 
Interest cost1.5 2.1 5.9 
Expected return on plan assets (0.4)(3.2)
Amortization of prior service credit(10.1)(9.8)(5.4)
Recognition of net actuarial (gains) losses(4.1)1.4 (18.0)
Net periodic credit:$(12.5)$(6.5)$(20.5)
Schedule of Defined Benefit Plan, Assumptions
Assumptions:202120202019
Discount rate2.62 %3.43 %
3.48% to 4.30%
Rate of return %3.00 %4.85 %
The following table summarizes assumptions used to measure the benefit obligation for the other postretirement benefit plans at December 31:
Assumptions:20212020
Discount rate2.99 %2.62 %
Schedule of Changes in Projected Benefit Obligations
  
20212020
Change in benefit obligation:
Benefit obligation at beginning of year$57.6 $63.4 
Service cost0.2 0.2 
Interest cost1.5 2.1 
Plan amendments (3.1)
Actuarial (gains) losses(4.1)1.8 
Benefits paid(4.1)(6.8)
Benefit obligation at end of year$51.1 $57.6 
Schedule of Changes in Fair Value of Plan Assets
Change in plan assets:
Fair value of plan assets at beginning of year$11.1 $64.4 
Company contributions / payments 2.7 
Transfer to VEBA trust for certain active employees' medical benefits(11.1)(50.0)
Return on plan assets 0.8 
Benefits paid (6.8)
Fair value of plan assets at end of year 11.1 
Funded status at end of year$(51.1)$(46.5)
Schedule of Defined Benefit Plans Amounts recognized on the Consolidated Balance Sheets
Amounts recognized on the Consolidated Balance Sheets:
Current liabilities(5.3)(5.2)
Non-current liabilities(45.8)(41.3)
 $(51.1)$(46.5)
Schedule of Defined Benefit Plans Amounts recognized in accumulated other comprehensive income
Amounts recognized in accumulated other comprehensive loss (income):
Net prior service credit$(81.4)$(91.5)
Accumulated other comprehensive loss (income)$(81.4)$(91.5)
Changes to prior service credit recognized in accumulated other comprehensive
     loss (income):
Accumulated other comprehensive income at beginning of year$(91.5)$(98.2)
Prior service credit (3.1)
Recognized prior service credit10.1 9.8 
Total recognized in accumulated other comprehensive loss (income) at December 31$(81.4)$(91.5)
Note 17 - Other Postretirement Benefit Plans (continued)
Schedule of Fair Value, Assets Measured on Recurring Basis
The following table presents those investments of the Company’s VEBA trust assets as of December 31, 2020:
Balance at December 31, 2020
Assets:NAVLevel 1Level 2Level 3
Cash and cash equivalents $0.5 $— $— $— 
Mutual fund - fixed income— 10.6 — — 
Total Assets$0.5 $10.6 $— $— 
Schedule of Future Pension Benefit Payments
Estimated future benefit payments to be funded by the Company are expected to be as follows:
Future Benefit Payments
2022$
2023
2024
2025
2026
2027-203117