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Acquisitions - Pro Forma Results of Acquisitions (Detail) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2017 | Mar. 31, 2016
Business Combination [Abstract] |  |  |  |
Revenue | $ 196.9 | $ 207.4 | $ 582.3 | $ 610.0
Income from operations | 12.9 | 31.5 | 25.3 | 97.1
Net income (loss) | $ 4.2 | $ 23.6 | $ (9.1) | $ 66.6
Net income (loss) per share, basic | $ 0.06 | $ 0.33 | $ (0.13) | $ 0.95
Net income (loss) per share, diluted | $ 0.06 | $ 0.32 | $ (0.13) | $ 0.91

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- Definition The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463 + Details
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