v3.26.1
Pensions and Other Postretirement Benefits (Tables)
3 Months Ended
Mar. 31, 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
 First Quarter
 2026202520262025
 ($ in millions)
Service cost$$$$
Interest cost25 26 
Expected return on plan assets(52)(49)(2)(2)
Amortization of net losses— — 
Amortization of prior service benefit— — (6)(6)
Net benefit$(16)$(11)$(4)$(4)