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Retirement Plans | 6 Months Ended
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Mar. 31, 2019
Retirement Benefits [Abstract] |
Retirement Plans |
11. 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) |  | 2019 |  | 2018 |  | 2019 |  | 2018
Service cost |  | $ | 2 |  |  | $ | 2 |  |  | $ | 4 |  |  | $ | 4 |
Interest cost |  | 3 |  |  | 3 |  |  | 6 |  |  | 7 |
Expected return on plan assets |  | (3 | ) |  | (4 | ) |  | (8 | ) |  | (9 | )
Settlement (gain) loss |  | — |  |  | (6 | ) |  | — |  |  | (6 | )
Net periodic benefit cost |  | $ | 2 |  |  | $ | (5 | ) |  | $ | 2 |  |  | $ | (4 | )
The interest cost, expected return on plan assets and settlement (gain) loss components of net periodic benefit cost are included in other pension expense (income) in the consolidated statements of income (loss).

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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