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Commitments and Contingencies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Non-cancelable operating lease terms for certain office equipment 3 years    
Non-cancelable operating lease terms for store leases 5 years    
Common area maintenance (CAM) charges and real estate taxes $ 89.9ann_CommonAreaMaintenanceCamChargesAndRealEstateTaxes $ 84.4ann_CommonAreaMaintenanceCamChargesAndRealEstateTaxes $ 78.8ann_CommonAreaMaintenanceCamChargesAndRealEstateTaxes
Minimum      
Number of lease term extensions allowed 1ann_NumberOfLeaseTermExtensionsAllowed
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		    
Maximum      
Number of lease term extensions allowed 2ann_NumberOfLeaseTermExtensionsAllowed
/ us-gaap_RangeAxis
= us-gaap_MaximumMember