XML 35 R23.htm IDEA: XBRL DOCUMENT v3.23.1
Pensions and Other Postretirement Benefits (Tables)
3 Months Ended
Mar. 31, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Pension and Other Postretirement Benefit Cost Components
Pension and postretirement benefit cost components were as follows:

 Pension BenefitsOther Postretirement Benefits
 First Quarter
 2023202220232022
 ($ in millions)
Service cost$$10 $$
Interest cost27 17 
Expected return on plan assets(52)(53)(3)(3)
Amortization of net losses12 — — 
Amortization of prior service benefit— — (6)(6)
Net benefit$(18)$(14)$(4)$(6)