Schedule II Valuation And Qualifying Accounts (Details) - USD ($) $ in Millions		12 Months Ended
		Feb. 25, 2022	Feb. 26, 2021	Feb. 28, 2020
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	$ 9.4	$ 8.7
Charged to cost and expense		2.8	6.2	7.3
Deductions	[1]	(3.3)	(7.3)	(5.9)
Other adjustments	[2]	(0.2)	0.4	(0.7)
Valuation allowances and reserves, balance as of end of period		8.0	8.7	9.4
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		6.6	5.7	7.8
Charged to cost and expense		(2.7)	0.4	(1.9)
Deductions		0.0	0.0	0.0
Other adjustments	[3]	(0.2)	0.5	(0.2)
Valuation allowances and reserves, balance as of end of period		$ 3.7	$ 6.6	$ 5.7

[1] Primarily represents changes in our estimated provision for bad debts and 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.