Commitments (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 22, 2019	Feb. 23, 2018	Feb. 24, 2017
Long-term Purchase Commitment [Line Items]
Deferred Gain on Sale of Property	$ 0.0
Operating Leases, Rent Expense, Net	50.0	$ 53.7	$ 49.8
Operating Leases, Rent Expense, Sublease Rentals	0.8	$ 4.4	$ 4.0
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