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Pension and Postretirement Plans
 6 Months Ended
Mar. 31, 2023
Retirement Benefits [Abstract]  
Pension and Postretirement Plans Pension and Postretirement Plans
The components of the Company’s net periodic benefit cost (credit) associated with its defined benefit pension and postretirement plans, which are primarily recorded in selling, general and administrative expenses in the consolidated statements of income, are shown in the tables below in accordance with ASC 715, "Compensation – Retirement Benefits" (in millions):
 U.S. Pension Plans
Three Months Ended
March 31,		Six Months Ended
March 31,
 2023202220232022
Interest cost$20 $11 $41 $21 
Expected return on plan assets(33)(41)(67)(82)
Net actuarial loss15 60 23 18 
Settlement loss1 2 1 1 
Net periodic benefit cost (credit)$3 $32 $(2)$(42)
 Non-U.S. Pension Plans
Three Months Ended
March 31,		Six Months Ended
March 31,
 2023202220232022
Service cost$4 $5 $7 $11 
Interest cost17 10 33 20 
Expected return on plan assets(19)(21)(37)(42)
Net actuarial gain— (1)— (1)
Settlement loss— 8 — 8 
Net periodic benefit cost (credit)$2 $1 $3 $(4)

 Postretirement Benefits
Three Months Ended
March 31,		Six Months Ended
March 31,
 2023202220232022
Interest cost$1 $1 $2 $1 
Expected return on plan assets(2)(2)(4)(4)
Amortization of prior service credit(1)(1)(2)(2)
Net periodic benefit credit$(2)$(2)$(4)$(5)

Cumulative fiscal 2023 lump sum payouts triggered remeasurement events for certain pension plans in both the first and second quarters of fiscal 2023. During the three and six months ended March 31, 2023, the Company recognized net actuarial losses of $15 million and $23 million, respectively, primarily due to decreases in discount rates, partially offset by favorable plan asset performance.

Cumulative fiscal 2022 lump sum payouts triggered remeasurement events for certain pension plans in both the first and second quarters of fiscal 2022. During the three and six months ended March 31, 2022, the Company recognized net actuarial losses of $59 million and $17 million, respectively, primarily due to unfavorable plan asset performance, partially offset by increases in discount rates.