v3.26.1
Pension Plans, Retirement Benefits and Savings Plans (Table)
 3 Months Ended
Mar. 31, 2026
Retirement Benefits [Abstract]  
Summary of the components of net periodic benefit cost (benefit) for the Company's pension and postretirement benefit plans recognized in the consolidated statement of income [Table Text Block]
The following table summarizes the components of net periodic benefit cost (benefit) for the Company’s pension and postretirement benefit plans recognized in the consolidated statement of income for the three months ended March 31, 2026 and 2025.
 Pension PlansPostretirement Benefit Plans
(for the three months ended March 31, in millions)2026202520262025
Net Periodic Benefit Cost (Benefit):    
Service cost$30 $28 $— $— 
Non-service cost (benefit):    
Interest cost on benefit obligation42 44 1 1 
Expected return on plan assets(74)(70)— — 
Amortization of unrecognized:
Prior service benefit— — — (1)
Net actuarial (gain) loss 1 4 (3)(3)
Total non-service cost (benefit)(31)(22)(2)(3)
Net periodic benefit cost (benefit)$(1)$6 $(2)$(3)
The following table indicates the line items in which the respective service cost and non-service cost (benefit) are presented in the consolidated statement of income for the three months ended March 31, 2026 and 2025.
 Pension PlansPostretirement Benefit Plans
(for the three months ended March 31, in millions)2026202520262025
Service Cost:    
Claims and claim adjustment expenses$11 $11 $— $— 
General and administrative expenses19 17 — — 
Total service cost30 28 — — 
Non-Service Cost (Benefit):    
Claims and claim adjustment expenses(12)(8)(1)(1)
General and administrative expenses(19)(14)(1)(2)
Total non-service cost (benefit)(31)(22)(2)(3)
Net periodic benefit cost (benefit)$(1)$6 $(2)$(3)