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BUSINESS DESCRIPTION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Self-Insurance Accruals, Right of Use Asset, Lease Liabilities and Rent Expense, Shipping and Handling Costs (Details) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Self-Insurance Accruals |  |  |
(Increase) decrease in self-insurance expense due to change in estimates related to prior year open policy periods | $ 3.1 | $ (1.3) | $ 1.2
Self-insurance accruals, current | 8.5 | 10.1 |
Self-insurance accruals, noncurrent | 20.3 | 23.6 |
Shipping and Handling |  |  |
Shipping and Handling Costs: |  |  |
Costs of goods sold | $ 8.6 | $ 7.7 | $ 6.1

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- Definition Represents the increase or decrease in self-insurance expense resulting from changes in estimates related to prior year open policy periods related to continuing operations. + References No definition available. + Details
Name: | rgs_IncreaseDecreaseInSelfInsuranceExpenseDueToChangeInPriorYearEstimates
Namespace Prefix: | rgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | rgs_SelfInsuranceAccrualsAbstract
Namespace Prefix: | rgs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Carrying amount of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, arising from workmen's compensation-type of incidents that are expected to be paid within one year (or the normal operating cycle, if longer). + References No definition available. + Details
Name: | rgs_SelfInsuranceReserveWorkersCompensationCurrent
Namespace Prefix: | rgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Carrying amount of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, arising from workmen's compensation-type of incidents that are expected to be paid after one year (or the normal operating cycle, if longer). + References No definition available. + Details
Name: | rgs_SelfInsuranceReserveWorkersCompensationNoncurrent
Namespace Prefix: | rgs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | rgs_ShippingAndHandlingCostsAbstract
Namespace Prefix: | rgs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
Name: | us-gaap_CostOfGoodsAndServicesSold
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_ShippingAndHandlingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |