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Business Acquisitions - Pro Forma Results of Acquisitions (Detail) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016
Business Combinations [Abstract] |  |
Revenue | $ 782.8 | $ 819.7
Income from operations | 41.9 | 102.2
Net income | $ 2.5 | $ 71.8
Net income per share, basic | $ 0.04 | $ 1.03
Net income per share, diluted | $ 0.04 | $ 0.98

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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=79982066&loc=d3e1392-128463 + Details
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