Schedule II Valuation And Qualifying Accounts (Details) - USD ($) $ in Millions		12 Months Ended
		Feb. 28, 2020	Feb. 22, 2019	Feb. 23, 2018
Allowance for Losses on Accounts Receivable [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowances and reserves, balance as of beginning of period		$ 8.7	$ 11.1	$ 11.2
Charged to cost and expense		7.3	5.5	2.5
Charged to other accounts		0.0	0.0	(0.1)
Deductions	[1]	(5.9)	(8.2)	(3.0)
Other adjustments	[2]	(0.7)	0.3	0.5
Valuation allowances and reserves, balance as of end of period		9.4	8.7	11.1
Valuation Allowance for Deferred Income Tax Assets [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowances and reserves, balance as of beginning of period		7.8	9.5	7.9
Charged to cost and expense		(1.9)	1.7	1.9
Deductions		0.0	(3.0)	(1.1)
Other adjustments	[3]	$ (0.2)	(0.4)	0.8
Valuation allowances and reserves, balance as of end of period			$ 7.8	$ 9.5

[1] Primarily represents excess of accounts written off over recoveries.

[2] Primarily represents currency translation adjustments and $0.5 related to the sale of PolyVision in 2020.

[3] Primarily represents currency translation adjustments.