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.

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+ Details

Pension and Other Postretirement Benefits - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plans, employer contribution	$ 74	$ 70	$ 68
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 1,050	$ 1,010
Actual asset allocation (as percent)	100.00%	100.00%
Pension Benefits \| Return Seeking Assets
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation (as percent)	32.00%
Pension Benefits \| Liability Hedging Assets
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation (as percent)	68.00%