XML 23 R12.htm IDEA: XBRL DOCUMENT v3.25.1
Pension and Other Postretirement Benefits
 3 Months Ended
Mar. 31, 2025
Retirement Benefits [Abstract]  
Retirement Benefits Pension and Other Post-retirement Benefits
We have defined-benefit pension plans and retiree medical plans that provide post-retirement health and life insurance benefits.

The components of net periodic pension and retiree medical (income) loss were as follows (in millions):
Three Months Ended March 31,
 20252024
Interest cost$7.6 $7.4 
Expected return on plan assets(7.2)(7.9)
Amortization of net gain(0.2)(0.2)
Net periodic pension and retiree medical (income) loss (1)
$0.2 $(0.7)

(1)Included in Other, net, in our Condensed Consolidated Statements of Operations.