Summary Of Significant Accounting Policies (Schedule Of Other Long-Term Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013
Accounting Policies [Abstract]
Income taxes (Note F)	$ 101,696rost_UnrecognizedTaxBenefitsReserve	$ 104,944rost_UnrecognizedTaxBenefitsReserve	$ 82,500rost_UnrecognizedTaxBenefitsReserve
Deferred compensation (Note G)	94,054	88,269
Deferred rent	59,465us-gaap_DeferredRentCreditNoncurrent	64,671us-gaap_DeferredRentCreditNoncurrent
Tenant improvement allowances	19,562rost_TenantImprovementAllowances	19,744rost_TenantImprovementAllowances
Other Liabilities	4,723us-gaap_OtherLiabilities	9,939us-gaap_OtherLiabilities
Total	$ 279,500us-gaap_OtherLiabilitiesNoncurrent	$ 287,567us-gaap_OtherLiabilitiesNoncurrent

Tenant Improvement Allowances

No definition available.

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- Definition

The net amount of unrecognized tax benefits pertaining to uncertain tax positions taken or expected to be taken in tax returns as of the date of the statement of financial position

+ References

No definition available.

+ Details

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- Details

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- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer).

+ References

No definition available.

+ Details

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- Definition

For a classified balance sheet, the cumulative difference between the rental income or payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense, by the lessor or lessee, respectively, more than one year after the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 25

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7501430&loc=d3e39927-112707

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.26(c))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

The aggregate carrying amount, as of the balance sheet date, of liabilities not separately disclosed in the balance sheet.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Article 9

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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- Definition

Aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the balance sheet. Noncurrent liabilities are expected to be paid after one year (or the normal operating cycle, if longer).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.24)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 24

-Article 5

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