Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Aug. 28, 2015	Feb. 28, 2014
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 14.3	$ 14.6
Property, plant and equipment, accumulated depreciation	953.5	1,055.9
Other intangible assets, accumulated amortization	$ 42.1	$ 41.1