v3.26.1
PENSION AND OTHER POSTRETIREMENT BENEFIT PROGRAMS
 6 Months Ended
Jun. 30, 2026
Retirement Benefits [Abstract]  
PENSION AND OTHER POSTRETIREMENT BENEFIT PROGRAMS PENSION AND OTHER POSTRETIREMENT BENEFIT PROGRAMS
The following is a summary of net periodic benefit cost relating to our pension and OPEB plans.
Three Months Ended June 30,Six Months Ended June 30,
(in millions)2026202520262025
Pension benefits
Service cost$2 $3 $5 $6 
Interest cost33 34 64 68 
Expected return on plan assets(43)(44)(85)(88)
Amortization of net losses and prior service costs3 1 6 2 
Net periodic pension cost (benefit)$(5)$(6)$(10)$(12)
OPEB
Interest cost$2 $2 $3 $4 
Amortization of net loss and prior service credit(1)(4)(1)(8)
Net periodic OPEB cost (income)$1 $(2)$2 $(4)