Condensed Consolidated Statement of Shareholders' Equity Statement - USD ($) $ in Millions		Total	Performance Units [Member]	Restricted Stock [Member]
Retained earnings, beginning of period at Feb. 23, 2018		$ 819.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		103.4
Dividends paid		(48.3)
Retained earnings, end of period at Nov. 23, 2018		874.1
Accumulated other comprehensive income (loss), beginning of period at Feb. 23, 2018		(10.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)		(27.7)
Accumulated Other Comprehensive Income (Loss), End of Period at Nov. 23, 2018		(38.0)
Paid-in capital, beginning of period at Feb. 23, 2018	[1]	4.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issuances	[1]	0.6
Common stock repurchases	[1]	(4.1)
Performance units and restricted stock units expense		14.8
Other	[1]	2.5
Paid-in capital, end of period at Nov. 23, 2018	[1]	$ 18.4
Common shares outstanding, beginning of period at Feb. 23, 2018		116,157,443
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issuances		39,798
Common stock repurchases		(275,408)
Stock Issued During Period, Shares, New Issues			209,353	634,113
Common shares outstanding, end of period at Nov. 23, 2018		116,765,299
Retained earnings, beginning of period at Aug. 24, 2018		$ 852.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		37.3
Dividends paid		(16.0)
Retained earnings, end of period at Nov. 23, 2018		874.1
Accumulated other comprehensive income (loss), beginning of period at Aug. 24, 2018		(30.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)		(7.8)
Accumulated Other Comprehensive Income (Loss), End of Period at Nov. 23, 2018		(38.0)
Paid-in capital, beginning of period at Aug. 24, 2018	[1]	16.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issuances	[1]	0.2
Common stock repurchases	[1]	(0.6)
Performance units and restricted stock units expense		2.3
Other	[1]	0.3
Paid-in capital, end of period at Nov. 23, 2018	[1]	$ 18.4
Common shares outstanding, beginning of period at Aug. 24, 2018		116,683,614
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issuances		12,969
Common stock repurchases		(29,745)
Stock Issued During Period, Shares, New Issues			0	98,461
Common shares outstanding, end of period at Nov. 23, 2018		116,765,299
Stockholders' Equity Attributable to Parent		$ 854.5
Stockholders' Equity Attributable to Parent		849.8
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)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)		(9.0)
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
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)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)		5.5
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
Stockholders' Equity Attributable to Parent		$ 931.7

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