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Concentrations Of Credit Risk (Narrative) (Details) - Customer Concentration Risk [Member] - customer	12 Months Ended
	May 28, 2022	May 29, 2021	May 30, 2020
Revenue Benchmark [Member]
Concentration Risk [Line Items]
Number of major customers	0	0	0
Trade Accounts Receivable [Member]
Concentration Risk [Line Items]
Number of major customers	0	0

X

- Definition

Concentration Of Credit Risk, Number Of Customers

+ References

No definition available.

+ Details

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Namespace Prefix:	rgp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- 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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_TradeAccountsReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: