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Income Taxes Deferred Income Taxes, Income Taxes Receivable, Income Taxes Payable (Details) - USD ($)
$ in Millions
 12 Months Ended
Feb. 26, 2021
Feb. 28, 2020
Feb. 22, 2019
May 29, 2020
Deferred Tax Assets, Gross [Abstract]        
Employee benefit plan obligations $ 57.6 $ 68.9    
Deferred Tax Asset, Operating Lease Obligations 62.7 64.2    
Foreign and domestic net operating loss carryforwards 45.2 39.1    
Reserves and accruals 15.1 17.1    
Tax credit carryforwards 22.0 19.1   $ 22.0
Other, net 15.0 17.1    
Deferred income tax assets, gross 217.6 225.5    
Valuation Allowances (6.6) (5.7)    
Valuation allowance provisions and adjustments 0.4 (1.3) $ (1.3)  
Net deferred income tax assets 211.0 219.8    
Deferred Income Tax Liability 57.4 61.4    
Deferred Tax Liabilities [Abstract]        
Property, plant and equipment 32.3 28.6    
Intangible assets 13.0 9.8    
Deferred Tax Liabilities, Prepaid Expenses 2.0 2.2    
Deferred income tax liabilities 104.7 102.0    
Balance Sheet Related Disclosures [Abstract]        
Net deferred income taxes 106.3 117.8    
Deferred income tax assets - non-current 113.3 124.6    
Deferred income tax liabilities - non-current $ 7.0 6.8    
Current Taxes Payable or Refundable [Abstract]        
Income taxes receivable   8.0   49.5
Income Taxes Receivable, Noncurrent   7.8   0.0
Income taxes payable   $ 13.9   7.4
Foreign locations [Member]        
Deferred Tax Assets, Gross [Abstract]        
Valuation Allowances       $ (3.5)