Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	May 25, 2018	May 26, 2017
Earnings Per Share [Abstract]
Net income	$ 17.0	$ 18.1
Adjustment for earnings attributable to participating securities	(0.3)	(0.3)
Net income used in calculating earnings per share	$ 16.7	$ 17.8
Weighted-average common shares outstanding including participating securities (in millions)	118.7	120.0
Adjustment for participating securities (in millions)	(2.1)	(2.1)
Shares used in calculating basic earnings per share (in millions)	116.6	117.9
Effect of dilutive stock-based compensation (in millions)	0.0	0.3
Shares used in calculating diluted earnings per share (in millions)	116.6	118.2
Earnings per share, basic	$ 0.14	$ 0.15
Earnings per share, diluted	$ 0.14	$ 0.15
Total common shares outstanding at period end (in millions)	116.7	118.0
Anti-dilutive performance units excluded from computation of diluted earnings per share (in millions)	0.4	0.3