POSTRETIREMENT BENEFITS AND EMPLOYEE STOCK OWNERSHIP PLAN - Pension Plans With Accumulated And Projected Benefit Obligations In Excess Of Plan (Details) - USD ($) $ in Millions	Jun. 30, 2026	Jun. 30, 2025
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 7,380	$ 8,175
Fair value of plan assets	5,091	5,070
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	6,968	7,653
Fair value of plan assets	5,070	5,018
Other Retiree Benefits
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	837	802
Fair value of plan assets	$ 55	$ 70

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