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RELATED PARTY TRANSACTIONS AND CERTAIN OTHER TRANSACTIONS (Details) - Aircraft lease agreement - Chief Executive Officer - USD ($) |  | 12 Months Ended
--- | --- | ---
Nov. 13, 2013 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015
Related Party Transaction [Line Items] |  |  |  |
Rate to lease aircraft | $ 5,000 |  |  |
Sales, general and administrative |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Aircraft leasing expenses |  | $ 2,100,000 | $ 1,300,000 | $ 400,000

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- Definition Aircraft Leasing Hourly Rate + References No definition available. + Details
Name: | ubnt_AircraftLeasingHourlyRate
Namespace Prefix: | ubnt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Expenses incurred related to the lease of aircraft from outside third parties that are used in the entity's business operations. + References No definition available. + Details
Name: | us-gaap_AircraftRental
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RelatedPartyTransactionAxis=us-gaap_LeaseAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_ChiefExecutiveOfficerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_SellingGeneralAndAdministrativeExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |