Condensed Balance Sheets (Parenthetical) - USD ($) $ in Millions	Apr. 30, 2016	Jan. 30, 2016	May. 02, 2015
Statement of Financial Position [Abstract]
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	78,400,000	79,400,000	80,200,000
Treasury shares, shares	8,800,000	7,800,000	7,000,000
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 993.6	$ 949.2	$ 848.8