Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	May 24, 2019	May 25, 2018	Feb. 22, 2019	Feb. 23, 2018
Earnings Per Share [Abstract]
Net income	$ 17.8	$ 17.0
Adjustment for earnings attributable to participating securities	(0.3)	(0.3)
Net income used in calculating earnings per share	$ 17.5	$ 16.7
Weighted-average common shares outstanding including participating securities (in millions)	119,400,000	118,700,000
Adjustment for participating securities (in millions)	(2,100,000)	(2,100,000)
Shares used in calculating basic earnings per share (in millions)	117,300,000	116,600,000
Effect of dilutive stock-based compensation (in millions)	500,000	0
Shares used in calculating diluted earnings per share (in millions)	117,800,000	116,600,000
Earnings per share, basic	$ 0.15	$ 0.14
Earnings per share, diluted	$ 0.15	$ 0.14
Common Stock, Shares, Outstanding	117,313,755	116,680,035	116,766,610	116,157,443
Anti-dilutive performance units excluded from computation of diluted earnings per share (in millions)	0	400,000