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Consolidated Balance Sheets (Parenthetical) - $ / shares
Feb. 02, 2019
Feb. 03, 2018
Common shares, par value (usd per share) $ 0.18 $ 0.18
Common shares, authorized 500,000,000 500,000,000
Common shares, outstanding 51,900,000 60,500,000
Treasury shares, shares 18,100,000 26,700,000
Series A Redeemable Convertible Preferred Stock    
Preferred shares, par value (usd per share) $ 0.01  
Preferred shares, authorized 500,000,000  
Preferred shares, outstanding 625,000