Defined Benefit Plans - Accumulated Other Comprehensive (Income) Loss at the End of Year (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|---|---|---|---|
| Retirement Benefits [Abstract] | |||
| Net prior service credit | $ (9) | $ (11) | $ (13) |
| Net actuarial loss | 188 | 192 | 181 |
| Accumulated other comprehensive loss at the end of the year | $ 179 | $ 181 | $ 168 |
| X | ||||||||||
- Definition Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, Net Actuarial Gain or Loss, after Tax No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount, after tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|