The number of installments the equity based compensation are vested following the date of grant.

No definition available.

Name:	rt_NumberOfAnnualInstallments
Namespace Prefix:	rt_
Data Type:	xbrli:positiveIntegerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of company-owned restaurants for which the Board of Director's approved management's plan to close.

+ References

No definition available.

+ Details

Name:	rt_NumberOfCompanyownedRestaurantsPlannedToClose
Namespace Prefix:	rt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

This element represents the number of franchise Restaurant closinged during the period.

+ References

No definition available.

+ Details

Name:	rt_NumberOfFranchiseRestaurantsClosed
Namespace Prefix:	rt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of franchisees defaulting on lease payments.

+ References

No definition available.

+ Details

Name:	rt_NumberOfFranchiseesThatDefaultedOnLeasePayments
Namespace Prefix:	rt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of subleased restaurants currently in default as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	rt_NumberOfSubleasedRestaurantsCurrentlyInDefault
Namespace Prefix:	rt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Our obligation for future rent and other lease-related charges related to leases on which our sublessee has defaulted.

+ References

No definition available.

+ Details

Name:	rt_ObligationForFutureRentAndOtherLeaseRelatedChargesForClosedRestaurants
Namespace Prefix:	rt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
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-Subparagraph (b)
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount classified as property, plant and equipment attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
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+ Details

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

- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=rt_RestaurantsExpectedToCloseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=rt_SIPAnd1996SIPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

Note 16 - Subsequent Events (Details Textual) $ in Thousands			3 Months Ended	12 Months Ended
	Jul. 26, 2016	Jul. 19, 2016 shares	May 31, 2016 USD ($)	May 31, 2016 USD ($)	Jun. 02, 2015 USD ($)	Jun. 03, 2014 USD ($)	Aug. 11, 2016 USD ($)
Subsequent Event [Member] \| Restaurants Expected to Close [Member]
Operating Leases, Future Minimum Payments Due							$ 46,000
Subsequent Event [Member] \| Restricted Stock Units (RSUs) [Member] \| SIP and 1996 SIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period \| shares		284,000
Subsequent Event [Member] \| SIP and 1996 SIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross \| shares		803,000
Number Of Annual Installments		3
Subsequent Event [Member]
Number of Company-owned Restaurants Planned to Close							95
Number of Franchise Restaurants Closed	10
Restaurants Expected to Close [Member] \| Land and Other Assets Which Will Become Available-for-sale [Member]
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Current			$ 26,600	$ 26,600
Restaurants Expected to Close [Member]
Asset Impairment Charges			39,200
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Current			40,500	40,500
Asset Impairment Charges				58,647	$ 10,896	$ 24,132
Operating Leases, Future Minimum Payments Due			$ 613,184	$ 613,184
Number of Franchisees That Defaulted on Lease Payments			1	1
Number of Subleased Restaurants Currently in Default			3	3
Obligation for Future Rent and Other Lease-related Charges for Closed Restaurants			$ 900	$ 900