Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Jul. 29, 2017	Jan. 28, 2017	Jul. 30, 2016
Accumulated depreciation	$ 1,131.4	$ 1,049.4	$ 1,003.1
Common shares, par value (usd per share)	$ 0.18	$ 0.18	$ 0.18
Common shares, authorized	500,000,000	500,000,000	500,000,000
Common shares, outstanding	60,300,000	68,300,000	78,400,000
Treasury shares, shares	26,900,000	18,900,000	11,600,000
Series A Redeemable Convertible Preferred Stock
Preferred shares, par value (usd per share)	$ 0.01	$ 0.01
Preferred shares, authorized	500,000,000	500,000,000
Preferred shares, outstanding	625,000	625,000

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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