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Financial Instruments (Schedule of Outstanding Instruments, Fair Value Hedges) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Derivative [Line Items]
Document Period End Date	Jun. 30, 2017
Fair Value Hedging | Interest Rate Swap
Derivative [Line Items]
Notional Amount	$ 1,813	$ 1,963
Fair Value Hedging | Interest Rate Swap | Minimum
Derivative [Line Items]
Maturity Date	Jun. 15, 2018	Jun. 15, 2017
Fair Value Hedging | Interest Rate Swap | Maximum
Derivative [Line Items]
Maturity Date	Sep. 15, 2025	Sep. 15, 2025

X

- Definition

The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.

+ References

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- Definition

Nominal or face amount used to calculate payments on the derivative asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959

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- Definition

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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- Definition

Date the derivative contract matures, in CCYY-MM-DD format.

+ References

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