XML 24 R12.htm IDEA: XBRL DOCUMENT v3.24.2.u1
Pension and Other Postretirement Benefits
 6 Months Ended
Jun. 30, 2024
Retirement Benefits [Abstract]  
Retirement Benefits [Text Block] 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 were as follows (in millions):
Three Months Ended June 30,Six Months Ended June 30,
 2024202320242023
Interest cost$7.4 $7.8 $14.8 $15.5 
Expected return on plan assets(7.9)(7.8)(15.8)(15.5)
Amortization of net gain(0.2)(0.1)(0.4)(0.2)
Net periodic pension and retiree medical income (1)
$(0.7)$(0.1)$(1.4)$(0.2)

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