Retirement and Postretirement Employee Benefit Plans - Actuarial Assumptions For Net Periodic Pension Cost (Details) - Postretirement Plan |
12 Months Ended | ||
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Sep. 30, 2024 |
Sep. 30, 2023 |
Sep. 30, 2022 |
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Defined Benefit Plan Disclosure [Line Items] | |||
Discount rate pension liability | 5.01% | 6.06% | |
Discount rate postretirement cost | 6.06% | 5.61% | 3.01% |
Expected return on plan assets pension liability | 5.14% | 4.94% | |
Expected return on plan assets postretirement cost | 4.94% | 4.94% | 4.94% |
Initial trend rate pension liability | 6.75% | 6.50% | |
Initial trend rate postretirement cost | 6.50% | 6.25% | 6.25% |
Ultimate trend rate pension liability | 5.00% | 5.00% | |
Ultimate trend rate postretirement cost | 5.00% | 4.75% | 5.00% |
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- Definition An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. No definition available.
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- Definition The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status. No definition available.
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- Definition The ultimate trend rate for health care costs. No definition available.
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Ultimate trend rate for health care cost for defined benefit postretirement plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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