XML 43 R30.htm IDEA: XBRL DOCUMENT v3.24.1.u1
Employee Benefit Plans (Tables)
3 Months Ended
Mar. 31, 2024
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Schedule of Net Benefit (Credits) Costs [Table Text Block] The components of net periodic benefit cost (credit) are as follows:
 Pension Benefits
 Three Months Ended
 March 31,
 20242023
 (in millions)
 
Service cost$0.3 $0.3 
Interest cost5.8 6.0 
Expected asset return(7.2)(7.2)
Amortized loss1.7 1.0 
Net periodic benefit cost$0.6 $0.1 
 
 Other Postretirement Benefits
 Three Months Ended
 March 31,
 20242023
 (in millions)
 
Service cost$ $— 
Interest cost2.1 2.5 
Amortized gain(2.5)(2.1)
Amortized prior service credit(0.1)(0.1)
Net periodic benefit cost (credit)$(0.5)$0.3