v3.26.3
Pensions and Other Postretirement Benefits (Tables)
 9 Months Ended
Sep. 30, 2026
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Schedule of Pension and Postretirement Benefit Cost Components
Pension and postretirement benefit cost components were as follows:

Pension BenefitsOther Postretirement Benefits
Third Quarter
2026202520262025
($ in millions)
Service cost$7 $6 $1 $1 
Interest cost25 27 3 3 
Expected return on plan assets(53)(49)(2)(2)
Amortization of net losses (gains)4 6 — (1)
Amortization of prior service benefit— — (6)(5)
Net benefit$(17)$(10)$(4)$(4)

Pension BenefitsOther Postretirement Benefits
First Nine Months
2026202520262025
($ in millions)
Service cost$20 $18 $2 $2 
Interest cost75 80 9 10 
Expected return on plan assets(157)(147)(7)(7)
Amortization of net losses (gains)13 17 — (1)
Amortization of prior service benefit— — (17)(16)
Net benefit$(49)$(32)$(13)$(12)