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ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS - Capitalized Software (Details) - Capitalized software development costs - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020
Property, Plant and Equipment [Line Items] |  |
Capitalized software development costs | $ 127.7 | $ 111.2
Additions related to capitalized software development costs | $ 15.4 | $ 15.4
Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Amortization period | 3 years |
Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Amortization period | 5 years |

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- Definition Additions made to capitalized computer software costs during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + Details
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- Definition Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 926 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959 + Details
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