Facility, Square Foot Area

No definition available.

Name:	rost_FacilitySquareFootArea
Namespace Prefix:	rost_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of Options to Renew Store Lease for Five Year Period, Maximum

+ References

No definition available.

+ Details

Name:	rost_NumberOfOptionsToRenewStoreLeaseForFiveYearPeriodMaximum
Namespace Prefix:	rost_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of Options to Renew Store Lease for Five Year Period, Minimum

+ References

No definition available.

+ Details

Name:	rost_NumberOfOptionsToRenewStoreLeaseForFiveYearPeriodMinimum
Namespace Prefix:	rost_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- 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

- Definition

Term of the lessee'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

Name:	us-gaap_LesseeLeasingArrangementsOperatingLeasesRenewalTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_LesseeLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

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

- Definition

The number of units (items of property) under operating lease arrangements.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertySubjectToOrAvailableForOperatingLeaseNumberOfUnits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_MajorPropertyClassAxis=us-gaap_WarehouseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=rost_LosAngelesOfficeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Leases (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2015 option store	Feb. 01, 2014	Feb. 02, 2013
Operating Leased Assets [Line Items]
Number of store sites owned	3us-gaap_NumberOfRealEstateProperties
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, rent expense	$ 457.0us-gaap_LeaseAndRentalExpense	$ 434.9us-gaap_LeaseAndRentalExpense	$ 406.6us-gaap_LeaseAndRentalExpense
Los Angeles Office [Member]
Operating Leased Assets [Line Items]
Facility, square foot area	68,000
Warehouse [Member]
Operating Leased Assets [Line Items]
Number of warehouses leased	3
Warehouse [Member] \| Carlisle, Pennsylvania [Member]
Operating Leased Assets [Line Items]
Number of warehouses leased	2
Minimum [Member]
Operating Leased Assets [Line Items]
Non-cancelable lease term	3 years
Maximum [Member]
Operating Leased Assets [Line Items]
Non-cancelable lease term	10 years