Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Feb. 25, 2022	Nov. 26, 2021	Aug. 27, 2021	May 28, 2021	Feb. 26, 2021	Nov. 27, 2020	Aug. 28, 2020	May 29, 2020	Feb. 25, 2022	Feb. 26, 2021	Feb. 28, 2020
Earnings Per Share [Abstract]
Net Income (Loss) Attributable to Parent	$ (2.2)	$ 9.6	$ 24.7	$ (28.1)	$ 6.6	$ 2.1	$ 55.5	$ (38.1)	$ 4.0	$ 26.1	$ 199.7
Participating Securities, Distributed and Undistributed Earnings (Loss), Diluted									0.1	0.6	3.9
Net income used in calculating earnings per share									$ 3.9	$ 25.5	$ 195.8
Adjustment for participating securities (in millions)									(3.2)	(2.6)	(2.3)
Earnings per share, basic	$ (0.02)	$ 0.08	$ 0.21	$ (0.24)	$ 0.06	$ 0.02	$ 0.47	$ (0.33)	$ 0.03	$ 0.22	$ 1.67
Earnings per share, diluted	(0.02)	0.08	0.21	(0.24)	0.06	0.02	0.47	(0.33)	0.03	0.22	1.66
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Diluted	(0.02)	0.08	0.21	(0.24)	0.06	0.02	0.47	(0.33)	0.03	0.22	1.66
Basic	$ (0.02)	$ 0.08	$ 0.21	$ (0.24)	$ 0.06	$ 0.02	$ 0.47	$ (0.33)	$ 0.03	$ 0.22	$ 1.67
Including antidilutive securities
Earnings Per Share [Abstract]
Shares used in calculating basic earnings per share (in millions)									117.0	117.5	119.6
Weighted Average Number of Shares Outstanding, Diluted									117.4	117.8	120.2
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Shares used in calculating basic earnings per share (in millions)									117.0	117.5	119.6
Weighted Average Number of Shares Outstanding, Diluted									117.4	117.8	120.2
Excluding antidilutive securities
Earnings Per Share [Abstract]
Shares used in calculating basic earnings per share (in millions)									113.8	114.9	117.3
Weighted Average Number of Shares Outstanding, Diluted									114.2	115.2	117.9
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Shares used in calculating basic earnings per share (in millions)									113.8	114.9	117.3
Weighted Average Number of Shares Outstanding, Diluted									114.2	115.2	117.9