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Schedule II Valuation And Qualifying Accounts (Details) - USD ($)
$ in Millions
 12 Months Ended
Feb. 26, 2021
Feb. 28, 2020
Feb. 22, 2019
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 $ 9.4 $ 8.7 $ 11.1
Charged to cost and expense 6.2 7.3 5.5
Deductions [1] (7.3) (5.9) (8.2)
Other adjustments [2] 0.4 (0.7) 0.3
Valuation allowances and reserves, balance as of end of period 8.7 9.4 8.7
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 5.7 7.8 9.5
Charged to cost and expense 0.4 (1.9) 1.7
Deductions 0.0 0.0 (3.0)
Other adjustments [3] 0.5 (0.2) (0.4)
Valuation allowances and reserves, balance as of end of period $ 6.6 $ 5.7 $ 7.8
[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.