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Income Taxes - Schedule Of Income (Loss) Before Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Income Tax [Line Items]
Income (loss) before income taxes, United States	$ 147.0	$ 292.0	$ 243.6
Income (loss) before income taxes, Foreign	(12.1)	(14.2)	(10.3)
Income before income tax	$ 134.9	$ 277.8	$ 233.3

X

- Definition

Income Tax [Line Items]

+ References

No definition available.

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- Definition

The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 235



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.4-08.(h)(1)(i))



-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 940



-SubTopic 20



-Section 25



-Paragraph 1



-URI http://asc.fasb.org/extlink&oid=51673353&loc=d3e41242-110953



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-Publisher FASB



-Name Accounting Standards Codification



-Topic 235



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-Section S99



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-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 03



-Paragraph 10



-Article 5

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The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 235



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.4-08.(h)(1)(i))



-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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