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Financial Instruments (Schedule of Fair Value Gain Loss Derivative Instrument) (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Jun. 30, 2019
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Fair Value Hedging | Interest Rate Swaps |  |
Derivative [Line Items] |  |
Notional Amount | $ 550 | $ 2,150
Fair Value Gain/(Loss) | 27 | 40
Cash Flow Hedging | Foreign Currency Contracts |  |
Derivative [Line Items] |  |
Notional Amount | 653 | 869
Fair Value Gain/(Loss) | (4) | 4
Cash Flow Hedging | Forward Contracts [Member] |  |
Derivative [Line Items] |  |
Notional Amount | 200 | 0
Fair Value Gain/(Loss) | (16) | 0
Cash Flow Hedging | Currency Swap [Member] |  |
Derivative [Line Items] |  |
Notional Amount | 833 | 233
Fair Value Gain/(Loss) | 47 | 12
Cash Flow Hedging | Commodity Contracts |  |
Derivative [Line Items] |  |
Notional Amount | 16 | 20
Fair Value Gain/(Loss) | $ (1) | $ (3)

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