Leases (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Aug. 28, 2020	Aug. 23, 2019	Aug. 28, 2020	Aug. 23, 2019
Lessee, Lease, Description [Line Items]
Operating Leases, Future Minimum Payments, Remainder of Fiscal Year	[1]	$ 26.1		$ 26.1
Operating Lease, Payments		12.1	$ 11.5	24.7	$ 23.4
Operating Lease, Cost		12.9	12.5	26.0	24.6
Sublease Income		(0.6)	(0.3)	(0.9)	(0.4)
Lease, Cost		12.3	12.2	25.1	24.2
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		$ 1.4	$ 18.6	$ 1.9	$ 58.2
Operating Lease, Weighted Average Remaining Lease Term		6 years 9 months 18 days	7 years 3 months 18 days	6 years 9 months 18 days	7 years 3 months 18 days
Operating Leases, Future Minimum Payments, Due in Two Years	[1]	$ 48.5		$ 48.5
Operating Leases, Future Minimum Payments, Due in Three Years	[1]	41.6		41.6
Operating Leases, Future Minimum Payments, Due in Four Years	[1]	35.8		35.8
Operating Leases, Future Minimum Payments, Due in Five Years	[1]	33.3		33.3
Operating Leases, Future Minimum Payments, Due Thereafter	[1]	91.5		91.5
Operating Leases, Future Minimum Payments Due	[1]	276.8		276.8
Operating Lease interest included in future lease payments	[1]	35.3		35.3
Operating Lease, Liability	[1]	$ 241.5		$ 241.5

[1] Lease payments include options to extend lease terms that are reasonably certain of being exercised. The payments exclude legally binding minimum lease payments for leases signed but not yet commenced.