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PENSION AND OTHER POSTRETIREMENT BENEFIT PROGRAMS (Tables)
3 Months Ended
Mar. 31, 2025
Retirement Benefits [Abstract]  
Net Periodic Benefit Cost Relating to Pension and Other Postemployment Employee Benefit Plans
The following is a summary of net periodic benefit cost relating to our pension and OPEB plans.
Three Months Ended March 31,
(in millions)20252024
Pension benefits
Service cost$$
Interest cost34 45 
Expected return on plan assets(44)(59)
Amortization of net losses and prior service costs
Net periodic pension cost$(6)$(4)
OPEB
Interest cost$$
Amortization of net loss and prior service credit(4)(5)
Net periodic OPEB cost (income)$(2)$(3)