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Segment and Related Information - Reconciliation of Assets by Operating Segment and Geographic Region to Total Assets (Detail) - USD ($) $ in Millions | Jun. 30, 2017 | Jun. 30, 2016
--- | --- | ---
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Assets |  | $ 1,224.4 | $ 880.5
Operating segments and geographic region [Member] |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Assets |  | 1,025.2 | 641.6
Cash, cash equivalents, and marketable investment securities [Member] |  |  |
Segment Reporting, Asset Reconciling Item [Line Items] |  |  |
Assets | [1] | $ 199.2 | $ 238.9
[1] | The Company manages cash, cash equivalents, and marketable investment securities at the consolidated level for all segments

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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