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Benefit Plans Components of Benefit Plans (Details) - USD ($) | 12 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Defined Benefit Plan Disclosure |  |  |
Fixed and variable fund annual maximum contribution | $ 10,000 |  |
Defined contribution plan contribution amount | 116,000,000 | $ 105,000,000 | $ 97,000,000
Nonqualified Excess 401(k) Plan | 1,000,000 | 1,000,000 |
Accounts Payable and Accrued Liabilities, Current | $ 2,910,000,000 | $ 2,618,000,000 |
Minimum |  |  |
Defined Benefit Plan Disclosure |  |  |
Threshold for Deferral of Actuarial Gain/Loss Under Corridor Approach | 10.00% |  |

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- Definition The maximum annual contribution that employees can make to the fixed and variable fund benefit. The fixed fund benefit is a benefit that earns a specified rate of interest on contributions made by employees. The variable fund is a benefit that invests employee contributions in the Spartan U.S. Equity Index Fund-Fidelity Advantage Class (Spartan). + References No definition available. + Details
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- Definition Nonqualified Excess 401(k) Plan, Cost + References No definition available. + Details
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- Definition Threshold for Deferral of Actuarial Gain/Loss Under Corridor Approach + References No definition available. + Details
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- Definition Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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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. + References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + Details
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- Details
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