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Leases (Details) - USD ($)
$ in Millions
 12 Months Ended
Feb. 26, 2021
Feb. 28, 2020
Long-term Purchase Commitment [Line Items]    
Operating Leases, Future Minimum Payments Due, Next Twelve Months $ (52.0)  
Operating Leases, Future Minimum Payments, Due in Two Years (44.9)  
Operating Leases, Future Minimum Payments, Due in Three Years (39.6)  
Operating Leases, Future Minimum Payments, Due in Four Years (37.6)  
Operating Leases, Future Minimum Payments, Due in Five Years (30.1)  
Operating Leases, Future Minimum Payments, Due Thereafter (71.7)  
Deferred Gain on Sale of Property 0.0  
Operating Leases, Rent Expense, Net 49.4 $ 50.7
Operating Leases, Future Minimum Payments Due 275.9  
Lessee, Operating Lease, Liability, Undiscounted Excess Amount 32.6  
Operating Lease, Liability $ 243.3