XML 42 R31.htm IDEA: XBRL DOCUMENT v3.24.3
Pensions and Other Postretirement Benefits (Tables)
9 Months Ended
Sep. 30, 2024
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
 2024202320242023
 ($ in millions)
Service cost$$$— $
Interest cost26 27 
Expected return on plan assets(51)(53)(2)(2)
Amortization of net losses— (1)
Amortization of prior service benefit— — (6)(6)
Net benefit$(14)$(18)$(4)$(4)

 Pension BenefitsOther Postretirement Benefits
 First Nine Months
 2024202320242023
 ($ in millions)
Service cost$20 $19 $$
Interest cost80 81 11 13 
Expected return on plan assets(153)(157)(8)(8)
Amortization of net losses12 — (1)
Amortization of prior service benefit— — (18)(19)
Curtailment gain— — (20)— 
Net benefit$(41)$(54)$(33)$(12)