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Retirement Plans | 6 Months Ended
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Mar. 31, 2024
Retirement Benefits [Abstract] |
Retirement Plans |
12. Retirement Plans
Adient maintains non-contributory defined benefit pension plans covering primarily non-U.S. employees and a limited number of U.S. employees. The following table contains the components of net periodic benefit cost:
|  | Three Months Ended March 31, |  | Six Months Ended March 31,
(in millions) |  | 2024 |  | 2023 |  | 2024 |  | 2023
Service cost |  | $ | 2 |  |  | $ | 1 |  |  | $ | 3 |  |  | $ | 2 |
Interest cost |  | 5 |  |  | 5 |  |  | 10 |  |  | 9 |
Expected return on plan assets |  | (3) |  |  | (3) |  |  | (6) |  |  | (6) |
Net actuarial and settlement/curtailment (gain) loss |  | — |  |  | — |  |  | — |  |  | 8 |
Net periodic benefit cost |  | $ | 4 |  |  | $ | 3 |  |  | $ | 7 |  |  | $ | 13 |
The interest cost, expected return on plan assets, and net actuarial and settlement/curtailment (gain) loss components of net periodic benefit cost are included in other pension expense (income) in the consolidated statements of income. During the first six months of fiscal 2023, Adient recorded an $8 million curtailment loss associated with employee termination benefit plans in the Americas segment.

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