Financial Instruments (Schedule of outstanding instruments, fair value hedges) (Details) - Interest Rate Swaps - Fair Value Hedging - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2015	Jun. 30, 2014
Derivative [Line Items]
Derivative, notional amount	$ 1,613	$ 1,438
Minimum
Derivative [Line Items]
Derivative, maturity date	Jun. 15, 2017	Jun. 15, 2015
Maximum
Derivative [Line Items]
Derivative, maturity date	Jun. 15, 2022	Jun. 15, 2022

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

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=56946850&loc=SL5579245-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

Reference 3: 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=56946850&loc=SL5580258-113959

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant