Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Feb. 28, 2020	Feb. 22, 2019
Accounts receivable, allowances	$ 9.4	$ 8.7
Property, plant and equipment, accumulated depreciation	(977.7)	(1,009.3)
Other intangible assets, accumulated amortization	$ 56.7	$ 55.8
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	117,202,000	116,766,610
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	89,589,111	87,594,913
Common stock, shares outstanding	89,589,111	87,594,913
Class B Common Stock [Member]
Common stock, par value		$ 0
Common stock, shares authorized	475,000,000	475,000,000
Common stock, shares issued	27,612,889	29,171,697
Common stock, shares outstanding	27,612,889	29,171,697