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Employee Benefit Plan Obligations Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Feb. 26, 2021
Feb. 28, 2020
Feb. 22, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 4.2    
Multiemployer Plan, Contributions by Employer     $ 0.2
Deferred Compensation Arrangement with Individual, Compensation Expense 7.7 $ 3.3 4.6
Defined Contribution Plan, Cost 19.3 37.5 35.3
Defined Benefit Plan, Plan Assets, Amount 33.2 31.3  
Defined Contribution Plan, Employer Discretionary Contribution Amount $ 3.6    
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year, Description 21.6    
Other Postretirement Benefit Plans, Defined Benefit [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 3.5 4.0  
Defined Benefit Plan, Plan Assets, Amount 0.0 0.0 0.0
Defined Benefit Plan, Benefit Obligation 42.7 44.3 40.7
Pension Plans, Defined Benefit [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Defined Benefit Plan, Plan Assets, Contributions by Employer 4.1 4.9  
Defined Benefit Plan, Plan Assets, Amount 33.2 31.3 30.0
Defined Benefit Plan, Benefit Obligation $ 85.9 $ 82.5 $ 76.2
Pre-Age 65 Retirees [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year 5.84% 6.51%  
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate 4.50% 4.50%  
Foreign Plan [Member] | Qualified Defined Benefit Pension Plan [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 33.2 $ 31.3  
Defined Benefit Plan, Benefit Obligation $ 53.7 $ 49.5