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Retirement Benefits
 3 Months Ended
Dec. 31, 2024
Retirement Benefits [Abstract]  
Retirement Benefits Retirement Benefits
The components of net periodic pension and postretirement benefit cost were (in millions):
 Pension Benefits
 Three Months Ended
December 31,
 20242023
Service cost$10 $10 
Interest cost34 36 
Expected return on plan assets(41)(42)
Amortization of net actuarial loss6 — 
Net periodic pension benefit cost$9 $4 
 Other Postretirement Benefits
 Three Months Ended
December 31,
 20242023
Service cost$— $— 
Interest cost— 1 
Amortization of net actuarial loss1 — 
Net periodic postretirement benefit cost$1 $1 
The service cost component is included in Cost of sales and Selling, general and administrative expenses in the Consolidated Statement of Operations. All other components are included in Other income in the Consolidated Statement of Operations.