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Summary Of Significant Accounting Policies (Narrative) (Details) (USD $) | 0 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended | 1 Months Ended | 12 Months Ended |  |  |  |  |
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Dec. 15, 2011 | Feb. 01, 2014 center sqft segment | Feb. 02, 2013 | Jan. 28, 2012 | Jan. 29, 2011 | Feb. 01, 2014 Property, Plant and Equipment [Member] | Feb. 02, 2013 Property, Plant and Equipment [Member] | Jan. 28, 2012 Property, Plant and Equipment [Member] | Feb. 01, 2014 Minimum [Member] Equipment [Member] | Feb. 01, 2014 Minimum [Member] Land Improvements and Buildings [Member] | Feb. 01, 2014 Minimum [Member] Fixtures and Equipment [Member] | Feb. 01, 2014 Maximum [Member] Equipment [Member] | Feb. 01, 2014 Maximum [Member] Land Improvements and Buildings [Member] | Feb. 01, 2014 Maximum [Member] Fixtures and Equipment [Member] | Feb. 01, 2014 Ross Dress For Less [Member] store state | Feb. 02, 2013 Ross Dress For Less [Member] store | Feb. 01, 2014 DD's Discounts [Member] state store | Feb. 01, 2014 California [Member] center office warehouse | Jul. 31, 2013 Perris California Distribution Center [Member] sqft | Jan. 31, 2014 New York City Office [Member] | Oct. 31, 2013 New York City Office [Member] | Feb. 01, 2014 New York City Office [Member] sqft | Sep. 30, 2013 New York City Office [Member] | Feb. 01, 2014 Standby Letters of Credit [Member] | Feb. 02, 2013 Standby Letters of Credit [Member] | Feb. 01, 2014 Standby Letters of Credit [Member] New York City Office [Member] | Sep. 30, 2013 Standby Letters of Credit [Member] New York City Office [Member]
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Stores |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,146 |  | 130 |  |  |  |  |  |  |  |  |  |
Number of states company operates in |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 33 |  | 10 |  |  |  |  |  |  |  |  |  |
Number of distribution centers |  | 4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |
Number of buying offices in California |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |
Number of warehouses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |
Percent of stores located in California |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  |
Number of reportable segments |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock split, conversion ratio | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase obligations |  | $ 1,812,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of cash and cash equivalents considered as Level 1 inputs |  | 423,168,000 | 646,761,000 | 649,835,000 | 833,924,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Packaway inventory percentage of total inventories |  | 49.00% | 47.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property and equipment estimated useful life, straight-line method |  |  |  |  |  |  |  |  | 3 years | 20 years | 3 years | 12 years | 40 years | 7 years |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization expense on property and equipment |  | 206,111,000 | 185,491,000 | 159,892,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Computer hardware and software costs, net of amortization |  | 209,400,000 | 166,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest capitalized amount |  | 10,800,000 | 3,900,000 | 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property and equipment purchased but not yet paid |  |  |  |  |  | 61,300,000 | 23,700,000 | 11,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility, square foot area |  | 11,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,300,000 |  |  | 411,000 |  |  |  |  |
Purchase of Perris, California distribution center |  | 550,515,000 | 424,434,000 | 416,271,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 70,000,000 |  |  |  |  |  |  |  |
Sales and purchase agreement, property purchase price agreed upon |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 222,000,000 |  |  |  |  |  |
Sales and purchase agreement, property lease, term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 99 years |  |  |  |  |  |
Sales and purchase agreement, down payment paid for property, percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |
Escrow deposit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,300,000 |  |  | 11,100,000 |  |  |  |
Standby letter of credit, amount outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 24,300,000 | 33,800,000 | 11,100,000 | 11,100,000
Additional amount deposited to escrow |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,200,000 |  |  |  |  |  |  |
Number of stores closed |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11 | 8 |  |  |  |  |  |  |  |  |  |  |
Lease loss liability |  | 6,300,000 | 3,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Book cash overdrafts |  | 75,700,000 | 82,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advertising costs |  | $ 70,200,000 | $ 67,700,000 | $ 59,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares that could potentially dilute basic EPS |  | 2,900 | 53,900 | 5,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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