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Employee Benefit Plan Obligations Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Feb. 23, 2018
Feb. 24, 2017
Feb. 26, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Payment for Pension Benefits $ 5.0    
Payment for Other Postretirement Benefits 4.0    
Deferred Compensation Arrangement with Individual, Compensation Expense $ 5.9 $ 8.5 $ 5.9
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate 4.50% 4.50%  
Defined Contribution Plan, Cost $ 33.7 $ 32.7 28.8
Defined Contribution Plan, Estimated Future Employer Contributions in Next Fiscal Year 35.7    
Defined Benefit Plan, Fair Value of Plan Assets 33.1 46.7  
Defined Benefit Plan, Assets for Plan Benefits 0.5 0.2  
Defined Benefit Plan, Effect of change in assumption on Accumulated Benefit Obligation   17.8  
Other Postretirement Benefit Plans, Defined Benefit [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0.0 0.0 0.0
Defined Benefit Plan, Benefit Obligation 43.4 46.0 66.2
Pension Plans, Defined Benefit [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 33.1 46.7 47.3
Defined Benefit Plan, Benefit Obligation $ 80.1 $ 96.8 $ 93.4
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 7.01% 7.28%  
Qualified Defined Benefit Pension Plan [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment $ 7.1    
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, Fair Value of Plan Assets 33.1 $ 38.8  
Defined Benefit Plan, Benefit Obligation 47.5 55.1  
Defined Benefit Plan, Assets for Plan Benefits 0.5    
Overfunded Plan [Member] | 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, Fair Value of Plan Assets 32.8 18.4  
Defined Benefit Plan, Benefit Obligation $ 32.3 18.2  
Defined Benefit Plan, Assets for Plan Benefits   $ 0.2