Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	May 25, 2018	Feb. 23, 2018
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 11.2	$ 11.1
Property, plant and equipment, accumulated depreciation	993.9	998.1
Other intangible assets, accumulated amortization	$ 44.9	$ 44.6