Condensed Consolidated Statement of Shareholders' Equity Statement - USD ($) $ in Millions		Total	Performance Units [Member]	Restricted Stock [Member]
Other comprehensive income (loss)		$ (9.0)
Retained earnings, beginning of period at Feb. 22, 2019		880.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		133.2
Dividends paid		(51.9)
Retained earnings, end of period at Nov. 22, 2019		962.0
Accumulated other comprehensive income (loss), beginning of period at Feb. 22, 2019		(47.3)
Accumulated Other Comprehensive Income (Loss), End of Period at Nov. 22, 2019		(56.3)
Paid-in capital, beginning of period at Feb. 22, 2019	[1]	16.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issuances	[1]	0.6
Common stock repurchases	[1]	(8.7)
Performance units and restricted stock units expense		13.7
Other	[1]	4.0
Paid-in capital, end of period at Nov. 22, 2019	[1]	$ 26.0
Common shares outstanding, beginning of period at Feb. 22, 2019		116,766,610
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issuances		33,039
Common stock repurchases		(524,379)
Stock Issued During Period, Shares, New Issues			0	917,828
Common shares outstanding, end of period at Nov. 22, 2019		117,193,098
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased Retained Earnings, Value [Line Items]		$ 0.0
Other comprehensive income (loss)		5.5
Retained earnings, beginning of period at Aug. 23, 2019		924.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		54.9
Dividends paid		(17.4)
Retained earnings, end of period at Nov. 22, 2019		962.0
Accumulated other comprehensive income (loss), beginning of period at Aug. 23, 2019		(61.8)
Accumulated Other Comprehensive Income (Loss), End of Period at Nov. 22, 2019		(56.3)
Paid-in capital, beginning of period at Aug. 23, 2019	[1]	26.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issuances	[1]	0.2
Common stock repurchases	[1]	(2.8)
Performance units and restricted stock units expense		2.1
Other	[1]	0.0
Paid-in capital, end of period at Nov. 22, 2019	[1]	$ 26.0
Common shares outstanding, beginning of period at Aug. 23, 2019		117,243,960
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issuances		10,167
Common stock repurchases		(177,123)
Stock Issued During Period, Shares, New Issues			0	116,094
Common shares outstanding, end of period at Nov. 22, 2019		117,193,098
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased Retained Earnings, Value [Line Items]		$ 0.0
Stockholders' Equity Attributable to Parent		931.7
Stockholders' Equity Attributable to Parent		970.4
Other comprehensive income (loss)		20.5
Retained earnings, beginning of period at Feb. 28, 2020		1,011.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		19.5
Dividends paid		(31.8)
Retained earnings, end of period at Nov. 27, 2020		993.1
Accumulated other comprehensive income (loss), beginning of period at Feb. 28, 2020		(69.3)
Accumulated Other Comprehensive Income (Loss), End of Period at Nov. 27, 2020		(48.8)
Paid-in capital, beginning of period at Feb. 28, 2020	[1]	28.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issuances	[1]	0.6
Common stock repurchases	[1]	(36.8)
Performance units and restricted stock units expense		11.3
Other	[1]	0.0
Paid-in capital, end of period at Nov. 27, 2020	[1]	$ 3.5
Common shares outstanding, beginning of period at Feb. 28, 2020		117,202,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issuances		48,241
Common stock repurchases		(3,288,795)
Stock Issued During Period, Shares, New Issues			174,888	756,476
Common shares outstanding, end of period at Nov. 27, 2020		114,892,810
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased Retained Earnings, Value [Line Items]		$ (5.9)
Other comprehensive income (loss)		7.5
Retained earnings, beginning of period at Aug. 28, 2020		1,002.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		2.1
Dividends paid		(11.7)
Retained earnings, end of period at Nov. 27, 2020		993.1
Accumulated other comprehensive income (loss), beginning of period at Aug. 28, 2020		(56.3)
Accumulated Other Comprehensive Income (Loss), End of Period at Nov. 27, 2020		(48.8)
Paid-in capital, beginning of period at Aug. 28, 2020	[1]	1.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issuances	[1]	0.2
Common stock repurchases	[1]	(0.4)
Performance units and restricted stock units expense		2.0
Other	[1]	0.0
Paid-in capital, end of period at Nov. 27, 2020	[1]	$ 3.5
Common shares outstanding, beginning of period at Aug. 28, 2020		114,776,546
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issuances		21,351
Common stock repurchases		(44,201)
Stock Issued During Period, Shares, New Issues			0	139,114
Common shares outstanding, end of period at Nov. 27, 2020		114,892,810
Stockholders' Equity Attributable to Parent		$ 947.8

[1] Shares of our Class A and Class B common stock have no par value; thus, there are no balances for common stock.