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Financial Instruments (Schedule of Fair Value Gain Loss Derivative Instrument) (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Jun. 30, 2024
--- | --- | ---
Fair Value Hedging | Interest Rate Swap |  |
Derivative [Line Items] |  |
Notional Amount | $ 1,600 | $ 1,600
Fair Value Gain/(Loss) | (29) | (91)
Cash Flow Hedging | Foreign Currency Contracts |  |
Derivative [Line Items] |  |
Notional Amount | 575 | 579
Fair Value Gain/(Loss) | 5 | (7)
Cash Flow Hedging | Currency Swap [Member] |  |
Derivative [Line Items] |  |
Notional Amount | 332 | 334
Fair Value Gain/(Loss) | $ (24) | $ 11

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