Available-for-Sale Securities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
Mar. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities	$ 0
Short Term
Schedule of Available-for-sale Securities [Line Items]
Weighted average effective maturity	6 months
Long Term
Schedule of Available-for-sale Securities [Line Items]
Weighted average effective maturity	15 months

The amount by which the fair value of an investment in debt and equity securities categorized as Available-for-sale is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

Name:	us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration