Number of Unsecured Senior Notes Held

No definition available.

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- Definition

Sublimit for issuance of standby letters of credit

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Unamortized Discount And Debt Issuance Costs

+ References

No definition available.

+ Details

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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-Publisher FASB
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-Topic 835
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-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13476-108611

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ 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 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Balance Type:	credit
Period Type:	instant

- Details

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- Details

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- Details

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- Details

Name:	us-gaap_LongtermDebtTypeAxis=rost_SeriesBUnsecuredSeniorNotesMember
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Balance Type:
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- Details

Name:	us-gaap_LongtermDebtTypeAxis=rost_UnsecuredRevolvingCreditFacilityMember
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- Details

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- Details

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- Details

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- Details

Name:	us-gaap_DebtInstrumentAxis=rost_SeniorNotesdue2021Member
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Debt - Narrative (Details)	9 Months Ended
Debt - Narrative (Details)	Oct. 31, 2015 USD ($) note	Jan. 31, 2015 USD ($)	Nov. 01, 2014 USD ($)	Sep. 30, 2014 USD ($)
Debt Instrument [Line Items]
Total unamortized discount and debt issuance costs	$ 4,100,000	$ 4,400,000	$ 4,000,000
3.375% Senior Notes due 2024 [Member]
Debt Instrument [Line Items]
Unsecured senior notes interest rate				3.375%
Debt instrument				$ 250,000,000
Unsecured Series A and B Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument	$ 150,000,000
6.38% Series A Senior Notes due 2018 [Member]
Debt Instrument [Line Items]
Unsecured senior notes interest rate	6.38%
Debt instrument	$ 85,000,000
6.53% Series B Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Unsecured senior notes interest rate	6.53%
Debt instrument	$ 65,000,000
Unsecured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Borrowing capacity for revolving credit facility	$ 600,000,000
Revolving credit facility expiration date	Jun. 01, 2017
Sublimit for issuance of standby letters of credit	$ 300,000,000
Basis points margin over LIBOR	1.00%
Borrowings or standby letter of credit outstanding	$ 0
Level 1 [Member]
Debt Instrument [Line Items]
Unsecured senior notes estimated fair value	$ 423,000,000	$ 442,000,000	$ 426,000,000
Senior Note Held by Various Investors
Debt Instrument [Line Items]
Number of unsecured senior notes held \| note	2
6.38% Series A Senior Notes due 2018 \| 6.38% Series A Senior Notes due 2018 [Member]
Debt Instrument [Line Items]
Unsecured senior notes interest rate	6.38%	6.38%	6.38%
6.53% Series B Senior Notes due 2021 \| 6.53% Series B Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Unsecured senior notes interest rate	6.53%	6.53%	6.53%
3.375% Senior Notes due 2024 \| 3.375% Senior Notes due 2024 [Member]
Debt Instrument [Line Items]
Unsecured senior notes interest rate	3.375%	3.375%	3.375%