Pension and Other Postretirement Benefits - Schedule of Funded and Unfunded Pension Plans (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2023 |
|---|---|---|---|
| Defined Benefit Plan Disclosure [Line Items] | |||
| Grantor Trust assets | $ 265 | $ 266 | |
| Pension benefits | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Projected benefit obligation | 1,155 | 1,119 | $ 1,172 |
| Accumulated benefit obligation | 1,050 | 1,010 | |
| Fair value of plan assets | 904 | 891 | $ 853 |
| Grantor Trust assets | 265 | 266 | |
| Funded plans | Pension benefits | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Projected benefit obligation | 894 | 855 | |
| Accumulated benefit obligation | 794 | 747 | |
| Fair value of plan assets | 904 | 891 | |
| Unfunded plans | Pension benefits | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Projected benefit obligation | 261 | 264 | |
| Accumulated benefit obligation | 256 | 260 | |
| Fair value of plan assets | $ 0 | $ 0 |
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- Definition The total amount of cash and securities held by third party trustees pursuant to terms of debt instruments or other agreements as of the date of each statement of financial position presented, which can be used by the trustee only to pay the noncurrent portion of specified obligations. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of actuarial present value of benefits attributed to service rendered by employee for 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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