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Employee Benefit Plans | 9 Months Ended
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Jun. 30, 2020
Defined Benefit Plans And Other Postretirement Benefit Plans Disclosures [Abstract] |
Employee Benefit Plans |
5. | Employee Benefit Plans
Components of net periodic pension benefit cost were as follows (in millions):
|  | Three Months Ended June 30, |  |  | Nine Months Ended June 30, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Components of net periodic benefit cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 2.5 |  |  | $ | 2.4 |  |  | $ | 7.6 |  |  | $ | 7.2 |
Interest cost |  |  | 4.2 |  |  |  | 4.6 |  |  |  | 12.8 |  |  |  | 14.0 |
Expected return on plan assets |  |  | (5.1 | ) |  |  | (4.9 | ) |  |  | (15.4 | ) |  |  | (14.9 | )
Amortization of prior service cost (benefit) |  |  | 0.4 |  |  |  | 0.4 |  |  |  | 1.2 |  |  |  | 1.3 |
Curtailment |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1.2 |
Amortization of net actuarial loss (gain) |  |  | 0.9 |  |  |  | — |  |  |  | 2.5 |  |  |  | 0.1 |
Expenses paid |  |  | 1.0 |  |  |  | 0.6 |  |  |  | 3.0 |  |  |  | 1.8 |
Net periodic benefit cost |  | $ | 3.9 |  |  | $ | 3.1 |  |  | $ | 11.7 |  |  | $ | 10.7 |
Components of net periodic other post-employment benefit cost were as follows (in millions):
|  | Three Months Ended June 30, |  |  | Nine Months Ended June 30, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Components of net periodic benefit cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 0.9 |  |  | $ | 0.8 |  |  | $ | 2.6 |  |  | $ | 2.3 |
Interest cost |  |  | 0.4 |  |  |  | 0.5 |  |  |  | 1.2 |  |  |  | 1.5 |
Amortization of prior service cost (benefit) |  |  | (0.2 | ) |  |  | (0.4 | ) |  |  | (0.7 | ) |  |  | (1.1 | )
Amortization of net actuarial loss (gain) |  |  | — |  |  |  | (0.1 | ) |  |  | (0.1 | ) |  |  | (0.2 | )
Net periodic benefit cost |  | $ | 1.1 |  |  | $ | 0.8 |  |  | $ | 3.0 |  |  | $ | 2.5 |
Components of net periodic benefit cost other than “S ervice cost” and “Expenses paid” are included in “Miscellaneous, net” in the Condensed Consolidated Statements of Income. Administrative expense for the three and nine months ended June 3 0, 20 19, which was previously included in “Service cost”, is now reported in “Expenses paid” to improve the comparability between the periods.

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