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Defined Benefit Pension and Other Postretirement Plans | 9 Months Ended
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Jun. 30, 2022
Retirement Benefits [Abstract] |
Defined Benefit Pension and Other Postretirement Plans | Note 10 — Defined Benefit Pension and Other Postretirement Plans The Company maintains defined benefit plans and other postretirement plans for certain current and former employees. The service cost component of our pension and other postretirement plans, net of amounts capitalized, is reflected in “Operating and administrative expenses” on the Condensed Consolidated Statements of Income. The non-service cost component, net of amounts capitalized by Utilities as a regulatory asset, is reflected in “Other non-operating income, net” on the Condensed Consolidated Statements of Income. Other postretirement benefit cost was not material for all periods presented. Net periodic pension cost includes the following components:
Three Months Ended June 30, |  | 2022 |  | 2021
Service cost |  | $ | 4 |  |  | $ | 3 |
Interest cost |  | 6 |  |  | 5 |
Expected return on assets |  | (12) |  |  | (10) |
Amortization of: |  |  |  |
Actuarial loss |  | 2 |  |  | 4 |
Net cost |  | $ | — |  |  | $ | 2 |
Nine Months Ended June 30, |  | 2022 |  | 2021
Service cost |  | $ | 12 |  |  | $ | 9 |
Interest cost |  | 19 |  |  | 16 |
Expected return on assets |  | (37) |  |  | (30) |
Amortization of: |  |  |  |
Actuarial loss |  | 6 |  |  | 11 |
Net cost |  | $ | — |  |  | $ | 6 |

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