Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Feb. 24, 2017	Feb. 26, 2016
Accounts receivable, allowances	$ 11.2	$ 11.7
Property, plant and equipment, accumulated depreciation	(959.6)	(936.8)
Other intangible assets, accumulated amortization	$ 43.2	$ 42.7
Preferred stock, par value	$ 0	$ 0
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, shares outstanding	117,300,000	119,400,000
Class A Common Stock [Member]
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	475,000,000	475,000,000
Common stock, shares issued	85,975,298	87,759,355
Common stock, shares outstanding	85,975,298	87,759,355
Class B Common Stock [Member]
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	475,000,000	475,000,000
Common stock, shares issued	31,348,049	31,611,411
Common stock, shares outstanding	31,348,049	31,611,411