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Summary of Significant Accounting Policies Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Millions | Feb. 03, 2018 | Jan. 28, 2017
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Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |
Prepaid Expense, Current | $ 17.8 | $ 13.5
Other Assets, Current | $ 27.6 | $ 16.4

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