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Other Postretirement Benefit Plans
 3 Months Ended
Mar. 31, 2024
Postretirement Plan  
Defined Benefit Plan Disclosure [Line Items]  
Other Postretirement Benefit Plans
Note 17 - Other Postretirement Benefit Plans
The following table sets forth the net periodic benefit cost for the Company’s other postretirement benefit plans. The amounts for the three months ended March 31, 2024 are based on calculations prepared by the Company's actuaries and represent the Company’s best estimate of that period’s proportionate share of the amounts to be recorded for the year ending December 31, 2024.
 Three Months Ended
March 31,
 20242023
Net periodic benefit credit:
Interest cost$0.5 $0.5 
Amortization of prior service credit(2.1)(2.1)
Net periodic benefit credit$(1.6)$(1.6)