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Employee Benefit Plans (Tables) | 9 Months Ended
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Jun. 30, 2020
Compensation And Retirement Disclosure [Abstract] |
Schedule of Components of Pension and Other Postretirement Benefit Costs for Continuing Operation | The following table details the components of pension and other postretirement benefit costs for continuing operations.
|  | Pension benefits |  |  | Other postretirement benefits |
(In millions) |  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Three months ended June 30 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 1 |  |  | $ | 1 |  |  | $ | — |  |  | $ | 1 |
Interest cost |  |  | 2 |  |  |  | 2 |  |  |  | 1 |  |  |  | — |
Expected return on plan assets |  |  | (3 | ) |  |  | (2 | ) |  |  | — |  |  |  | — |
Curtailment |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total net periodic benefit costs |  | $ | — |  |  | $ | 1 |  |  | $ | 1 |  |  | $ | 1 |
Nine months ended June 30 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 3 |  |  | $ | 4 |  |  | $ | 1 |  |  | $ | 1 |
Interest cost |  |  | 5 |  |  |  | 8 |  |  |  | 1 |  |  |  | 1 |
Expected return on plan assets |  |  | (7 | ) |  |  | (8 | ) |  |  | — |  |  |  | — |
Curtailment |  |  | — |  |  |  | (18 | ) |  |  | — |  |  |  | — |
Total net periodic benefit costs (income) |  | $ | 1 |  |  | $ | (14 | ) |  | $ | 2 |  |  | $ | 2 |

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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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