Financial Instruments (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Derivative [Line Items]
Payments for (Proceeds from) Hedge, Financing Activities	$ 0	$ (14)
Designated as Hedging Instrument \| Fair Value Hedging \| Interest Rate Swap
Derivative [Line Items]
Derivative, notional amount	$ 650	100
Designated as Hedging Instrument \| Cash Flow Hedging [Member] \| Interest Rate Swap
Derivative [Line Items]
Derivative, notional amount		$ 200

The net cash outflow or inflow for a financial contract that meets the hedge criteria as either cash flow hedge, fair value hedge or hedge of net investment in foreign operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3098-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 27
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3581-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3095-108585

Name:	us-gaap_PaymentsForProceedsFromHedgeFinancingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration