Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 28, 2020	Feb. 22, 2019
Long-term Purchase Commitment [Line Items]
Operating Leases, Future Minimum Payments, Remainder of Fiscal Year	$ 50.6
Operating Leases, Future Minimum Payments, Due in Two Years	(47.2)
Operating Leases, Future Minimum Payments, Due in Three Years	(40.8)
Operating Leases, Future Minimum Payments, Due in Four Years	(35.3)
Operating Leases, Future Minimum Payments, Due in Five Years	(33.0)
Operating Leases, Future Minimum Payments, Due Thereafter	(89.8)
Deferred Gain on Sale of Property	0.0
Operating Leases, Rent Expense, Net	50.7
Operating Leases, Future Minimum Payments Due	296.7
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	39.6
Operating Lease, Liability	$ 257.1
Minimum annual rental commitment [Member]
Long-term Purchase Commitment [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months		$ (46.0)
Operating Leases, Future Minimum Payments, Due in Two Years		(41.7)
Operating Leases, Future Minimum Payments, Due in Three Years		(40.5)
Operating Leases, Future Minimum Payments, Due in Four Years		(36.5)
Operating Leases, Future Minimum Payments, Due in Five Years		(28.0)
Operating Leases, Future Minimum Payments, Due Thereafter		(72.2)
Operating Leases, Future Minimum Payments Due		264.9
Minimum annual sublease rental income [Member]
Long-term Purchase Commitment [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months		(0.6)
Operating Leases, Future Minimum Payments, Due in Two Years		(0.3)
Operating Leases, Future Minimum Payments, Due in Three Years		(0.2)
Operating Leases, Future Minimum Payments, Due in Four Years		(0.2)
Operating Leases, Future Minimum Payments, Due in Five Years		(0.2)
Operating Leases, Future Minimum Payments, Due Thereafter		(0.6)
Operating Leases, Future Minimum Payments Due		2.1
Minimum annual commitments, net [Member]
Long-term Purchase Commitment [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months		(45.4)
Operating Leases, Future Minimum Payments, Due in Two Years		(41.4)
Operating Leases, Future Minimum Payments, Due in Three Years		(40.3)
Operating Leases, Future Minimum Payments, Due in Four Years		(36.3)
Operating Leases, Future Minimum Payments, Due in Five Years		(27.8)
Operating Leases, Future Minimum Payments, Due Thereafter		(71.6)
Operating Leases, Future Minimum Payments Due		$ 262.8