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Employee Benefit Plans (Tables) | 9 Months Ended
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Jun. 30, 2020
Defined Benefit Plans And Other Postretirement Benefit Plans Disclosures [Abstract] |
Schedule of Net Periodic Benefit Cost | 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 |

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- References No definition available. + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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