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Foreign Exchange Forward Contracts (Narratives) (Details) $ in Millions | 12 Months Ended
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Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) Contract | Jun. 30, 2015 USD ($)
Derivative [Line Items] |  |  |
Number of foreign currency forward contracts outstanding | Contract |  | 0 |
Foreign currency transaction realized gain (loss) | $ (0.7) | $ 1.3 | $ (1.0)
Not Designated as Hedging Instrument | Forward Foreign Currency Contracts |  |  |
Derivative [Line Items] |  |  |
Notional principal amount of forward foreign currency contracts | $ 6.7 |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Amount before tax of foreign currency transaction realized gain (loss) recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64836518&loc=d3e30690-110894 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64836518&loc=d3e30700-110894 + Details
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