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           CONSOLIDATED STATEMENT OF OPERATIONS (USD $) 
        In Millions, except Per Share data, unless otherwise specified  | 
        3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
| 
           Aug. 02, 2014 
         | 
        
           Aug. 03, 2013 
         | 
        
           Aug. 02, 2014 
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           Aug. 03, 2013 
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      |
| Income Statement [Abstract] | ||||
| Net sales | $ 2,031.1 | $ 1,854.9 | $ 4,031.4 | $ 3,720.7 | 
| Cost of sales | 1,337.0 | 1,206.2 | 2,640.7 | 2,416.0 | 
| Gross profit | 694.1 | 648.7 | 1,390.7 | 1,304.7 | 
| Selling, general and administrative expenses | 489.1 | 447.4 | 953.8 | 886.9 | 
| Operating income | 205.0 | 201.3 | 436.9 | 417.8 | 
| Interest expense, net | 8.4 | 0.7 | 16.6 | 1.3 | 
| Other (income) expense, net | 0 | (0.2) | 0 | 0.2 | 
| Income before income taxes | 196.6 | 200.8 | 420.3 | 416.3 | 
| Provision for income taxes | 75.1 | 76.1 | 160.6 | 158.1 | 
| Net income | $ 121.5 | $ 124.7 | $ 259.7 | $ 258.2 | 
| Net income per share: | ||||
| Basic net income per share (usd per share) | $ 0.59 | $ 0.56 | $ 1.26 | $ 1.15 | 
| Diluted net income per share (usd per share) | $ 0.59 | $ 0.56 | $ 1.25 | $ 1.15 | 
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- Definition 
          Total costs related to goods produced and sold during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
          
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- Definition 
          Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The net amount of operating interest income (expense). Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The net result for the period of deducting operating expenses from operating revenues. No definition available. 
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- Definition 
          The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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