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Financial Instruments (Schedule of Fair Value Gain Loss Derivative Instrument) (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Jun. 30, 2017
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Fair Value Hedging | Interest Rate Swaps |  |
Derivative [Line Items] |  |
Notional Amount | $ 2,313 | $ 1,813
Fair Value Gain/(Loss) | (78) | (19)
Cash Flow Hedging | Foreign Currency Contracts |  |
Derivative [Line Items] |  |
Notional Amount | 674 | 720
Fair Value Gain/(Loss) | 0 | 1
Cash Flow Hedging | Commodity Contracts |  |
Derivative [Line Items] |  |
Notional Amount | 12 | 17
Fair Value Gain/(Loss) | $ 0 | $ (1)

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611 + Details
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