Financial Instruments Narrative (Details) - USD ($)	3 Months Ended
Sep. 30, 2018	Sep. 30, 2017
Derivative [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	$ 0
Gain (Loss) on Derivative Used in Net Investment Hedge, after Tax	0
Currency Swap [Member]
Derivative [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	200,000,000
Other Nonoperating Income (Expense) [Member] \| Not Designated as Hedging Instrument [Member] \| Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 1,000,000	$ (1,000,000)

Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement.

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-Publisher FASB
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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Nominal or face amount used to calculate payments on the derivative liability.

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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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Amount, after tax, of reclassification from accumulated other comprehensive income (AOCI) of gain (loss) from increase (decrease) in fair value of net investment hedge.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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