Condensed Balance Sheets (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	May 02, 2015	Jan. 31, 2015	May 03, 2014
Statement of Financial Position [Abstract]
Common shares, par value (usd per share)	$ 0.18	$ 0.18	$ 0.18
Common shares, authorized	500us-gaap_CommonStockSharesAuthorized	500us-gaap_CommonStockSharesAuthorized	500us-gaap_CommonStockSharesAuthorized
Common shares, outstanding	80.2us-gaap_CommonStockSharesOutstanding	80.3us-gaap_CommonStockSharesOutstanding	80.2us-gaap_CommonStockSharesOutstanding
Treasury shares, shares	7.0us-gaap_TreasuryStockShares	6.9us-gaap_TreasuryStockShares	7.0us-gaap_TreasuryStockShares
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 848.8	$ 852.1	$ 816.3

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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