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Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
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Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2013
Stock-Based Compensation (Additional Textual) [Abstract] |  |  |
Maximum period of achievement of performance goals to earn performance units | 3 years |  |
Minimum performance period of individual required to earn performance units | 3 years |  |
Stock Option [Member] |  |  |
Stock-Based Compensation (Textual) [Abstract] |  |  |
Compensation expense related to stock option | $ 3.2 | $ 4.3 | $ 6.2
Unrecognized compensation cost | $ 2.1 |  |
Unrecognized compensation costs, weighted average period | 2 years 7 months |  |
Weighted average fair value of options granted | $ 10.16 | $ 13.76 | $ 13.53
Fair value of options vested | $ 7.6 | $ 5.1 | $ 5.2
Tax benefits resulting from stock-based compensation deductions in excess of amounts reported for financial reporting purposes | 1.3 | 6.0 | 4.2
Cash received from the exercise of capital stock option | 11.7 | 20.6 | 12.5
Tax benefit from the exercise of capital stock option | 2.0 | 4.6 | 2.8
Total Intrinsic value of options exercised | 5.3 | 14.8 | 8.3
Restricted Stock Units - Time Vesting Performance Vesting [Member] |  |  |
Stock-Based Compensation (Textual) [Abstract] |  |  |
Compensation expense related to stock option | 13.5 | $ 13.1 | $ 15.2
Unrecognized compensation cost | $ 12.5 |  |
Unrecognized compensation costs, weighted average period | 2 years 6 months 10 days |  |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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