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Leases (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Feb. 01, 2014 option sqft store | Feb. 02, 2013 | Jan. 28, 2012 | Jul. 31, 2013 Perris California Distribution Center [Member] sqft | Feb. 01, 2014 Perris California Distribution Center [Member] acre | Feb. 01, 2014 Moreno Valley, California [Member] acre | Feb. 01, 2014 Pleasanton California Office [Member] sqft | Feb. 01, 2014 New York City Office [Member] sqft | Feb. 01, 2014 Los Angeles Office [Member] sqft | Feb. 01, 2014 Warehouse [Member] warehouse | Feb. 01, 2014 Warehouse [Member] Carlisle, Pennsylvania [Member] warehouse
Operating Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of non-lease store site | 3 |  |  |  |  |  |  |  |  |  |
Non-cancelable lease term, minimum - years | 3 years |  |  |  |  |  |  |  |  |  |
Non-cancelable lease term, maximum - years | 10 years |  |  |  |  |  |  |  |  |  |
Number of options to renew store lease for five year period, minimum | 3 |  |  |  |  |  |  |  |  |  |
Number of options to renew store lease for five year period, maximum | 4 |  |  |  |  |  |  |  |  |  |
Renewal option term of leases | 5 years |  |  |  |  |  |  |  |  |  |
Operating Leases of Lessee, Number of Warehouses |  |  |  |  |  |  |  |  |  | 3 | 2
Trailer parking, acres |  |  |  |  | 10 | 20 |  |  |  |  |
Facility, square foot area | 11,000 |  |  | 1,300,000 |  |  | 192,000 | 411,000 | 52,000 |  |
Operating lease facility, term expiration date |  |  |  |  |  |  |  | 2022 | 2017 |  |
Operating leases, rent expense | $ 434.9 | $ 406.6 | $ 380.0 |  |  |  |  |  |  |  |

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- Definition Facility, Square Foot Area + References No definition available. + Details
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Namespace Prefix: | rost_
Data Type: | num:areaItemType
Balance Type: | na
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- Definition Non-Cancelable Lease Term Maximum Years + References No definition available. + Details
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- Definition Non-Cancelable Lease Term Minimum Years + References No definition available. + Details
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- Definition Non-Lease Store Site + References No definition available. + Details
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Namespace Prefix: | rost_
Data Type: | xbrli:positiveIntegerItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of Options to Renew Store Lease for Five Year Period, Maximum + References No definition available. + Details
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- Definition Number of Options to Renew Store Lease for Five Year Period, Minimum + References No definition available. + Details
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- Definition Operating Lease Facility Term Expiration Date + References No definition available. + Details
Name: | rost_OperatingLeaseFacilityTermExpirationDate
Namespace Prefix: | rost_
Data Type: | xbrli:normalizedStringItemType
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- Definition Trailer Parking, Acres + References No definition available. + Details
Name: | rost_TrailerParkingAcres
Namespace Prefix: | rost_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Term of the lessor's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Details
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- Definition The number of units (items of property) under operating lease arrangements. + References No definition available. + Details
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