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Pension Plans and Other Post Employment Benefit Plans
 9 Months Ended
Sep. 30, 2025
Retirement Benefits [Abstract]  
Pension and other Post Employment Benefits PENSION PLANS AND OTHER POST EMPLOYMENT BENEFITS
The following sets forth the components of the company's net periodic benefit (credit) cost for defined benefit pension plans and other post employment benefits ("OPEB"):

Three Months Ended September 30,Nine Months Ended September 30,
(In millions)2025202420252024
Defined Benefit Pension Plans:
Service cost$2 $3 $9 $12 
Interest cost158 162 471 488 
Expected return on plan assets(156)(133)(466)(399)
Amortization of prior service (benefit) cost(1)— (3)(2)
Settlement loss— 1 — 1 
Net periodic benefit (credit) cost$3 $33 $11 $100 
Other Post Employment Benefits:
Interest cost$10 $11 $30 $31 
Amortization of unrecognized (gain) loss(4)(3)(13)(9)
Amortization of prior service (benefit) cost(1)(1)(1)(1)
Net periodic benefit (credit) cost$5 $7 $16 $21