Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Nov. 01, 2014	Oct. 31, 2015	Nov. 01, 2014
Statement of Comprehensive Income [Abstract]
Pension liability adjustment, tax amount	$ 0.5	$ 0.4	$ 1.5	$ 1.1
Postretirement liability adjustment, tax benefit	$ 0.1	$ 0.0	$ (0.2)	$ 0.0