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Summary of Significant Accounting Policies (Narrative) (Details) $ / shares in Units, product in Thousands, ft² in Thousands, $ in Millions | 12 Months Ended
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Jan. 29, 2017 USD ($) ft² product Location $ / shares | Jan. 31, 2016 USD ($) $ / shares | Feb. 01, 2015 USD ($) $ / shares
Accounts, Notes, Loans and Financing Receivable, Net, Current [Abstract] |  |  |
Receivables, net | $ 2,029 | $ 1,890 |
Summary of Significant Accounting Policies [Abstract] |  |  |
Number of stores in operation | Location | 2,278 |  |
Fiscal year, period | 52 weeks | 52 weeks | 52 weeks
Investments classified as cash equivalents, original maturity | 3 months |  |
Percentage of merchandise inventories that are calculated using a cost method | 30.00% |  |
Recognized income tax positions are measured at the largest amount exceeding a probability of | 50.00% |  |
Gift card breakage income | $ 34 | $ 27 | $ 32
Services revenue | 4,000 | 4,000 | 3,800
Gross advertising expense | 955 | 868 | 884
Incremental and identifiable advertising co-op allowances | $ 166 | 129 | 125
Quantitative goodwill impairment assessment time interval | 3 years |  |
Goodwill Impairment | $ 0 | 0 | 0
Impairment of intangible assets, (excluding Goodwill) | $ 0 | $ 0 | $ 0
Per share weighted average fair value of stock options granted | $ / shares | $ 20.26 | $ 18.54 | $ 14.13
UNITED STATES [Member] |  |  |
Summary of Significant Accounting Policies [Abstract] |  |  |
Number of stores in operation | Location | 1,977 |  |
CANADA [Member] |  |  |
Summary of Significant Accounting Policies [Abstract] |  |  |
Number of stores in operation | Location | 182 |  |
MEXICO [Member] |  |  |
Summary of Significant Accounting Policies [Abstract] |  |  |
Number of stores in operation | Location | 119 |  |
Average Store Size [Member] |  |  |
Summary of Significant Accounting Policies [Abstract] |  |  |
Approximate average square footage of warehouse-style stores | ft² | 104 |  |
Average Garden Center Size [Member] |  |  |
Summary of Significant Accounting Policies [Abstract] |  |  |
Approximate average square footage of warehouse-style stores | ft² | 24 |  |
Trade Accounts Receivable [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable, Net, Current [Abstract] |  |  |
Receivables, net | $ 216 | $ 253 |
Minimum [Member] |  |  |
Summary of Significant Accounting Policies [Abstract] |  |  |
Approximate number of different types of inventory held at stores | product | 30 |  |
Maximum [Member] |  |  |
Summary of Significant Accounting Policies [Abstract] |  |  |
Approximate number of different types of inventory held at stores | product | 40 |  |
Maximum [Member] | Other Intangible Assets [Member] |  |  |
Summary of Significant Accounting Policies [Abstract] |  |  |
Intangible asset, useful life | 12 years |  |

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