XML 36 R27.htm IDEA: XBRL DOCUMENT v3.23.3
Retirement Benefits (Tables)
 9 Months Ended
Sep. 30, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Schedule of net pension and retiree health (benefit) cost
Net pension and retiree health (benefit) cost included the following components:
Defined Benefit Pension Plans
Three Months Ended September 30,Nine Months Ended September 30,
 2023202220232022
Components of net periodic cost:
Service cost$72.5 $87.1 $217.8 $264.4 
Interest cost162.3 98.9 486.0 299.0 
Expected return on plan assets(264.0)(235.1)(791.5)(711.6)
Amortization of prior service cost0.6 0.6 1.8 1.9 
Recognized actuarial loss30.6 85.3 91.5 256.8 
Net periodic cost$2.0 $36.8 $5.6 $110.5 
Retiree Health Benefit Plans
Three Months Ended September 30,Nine Months Ended September 30,
 2023202220232022
Components of net periodic benefit:
Service cost$7.9 $11.7 $23.8 $35.0 
Interest cost15.3 9.4 46.0 28.4 
Expected return on plan assets(45.5)(38.0)(136.6)(114.1)
Amortization of prior service benefit(13.3)(13.7)(39.7)(41.1)
Recognized actuarial (gain) loss(1.5)0.2 (4.4)0.7 
Net periodic benefit$(37.1)$(30.4)$(110.9)$(91.1)