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Income Taxes Carryforwards (Details) - USD ($) $ in Millions	Feb. 26, 2021	May 29, 2020	Feb. 28, 2020	Feb. 22, 2019	Feb. 23, 2018
Operating Loss Carryforwards [Line Items]
Liability for Uncertain Tax Positions presented net in underlying deferred tax asset		$ 2.3
Tax effected operating loss carryforwards	$ 45.2		$ 39.1
Tax effected operating loss carryforwards, valuation allowances		(3.0)
Deferred Tax Assets, Operating Loss Carryforwards net of federal tax benefit on State Losses		46.1
Tax effected operating loss carryforwards, net		43.1
Tax credit carryforwards	$ 22.0	22.0	19.1
Tax credit carryforward, valuation allowance		(3.1)
Tax credit carryforwards, net		18.9
Net operating loss and tax credit carryforwards		62.0
Unrecognized Tax Benefits		2.3	$ 2.0	$ 2.0	$ 2.2
Within One Year [Member]
Operating Loss Carryforwards [Line Items]
Tax effected operating loss carryforwards		0.0
Tax credit carryforwards		0.0
In Five or More Years [Member]
Operating Loss Carryforwards [Line Items]
Tax effected operating loss carryforwards		4.9
Tax credit carryforwards		22.0
No Expiration Date [Member]
Operating Loss Carryforwards [Line Items]
Tax effected operating loss carryforwards		41.2
Tax credit carryforwards		0.0
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, gross		0.9
Tax effected operating loss carryforwards		0.2
Tax effected operating loss carryforwards, valuation allowances		0.0
Tax effected operating loss carryforwards, net		0.2
Federal [Member] | Within One Year [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, gross		0.0
Tax effected operating loss carryforwards		0.0
Federal [Member] | In Five or More Years [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, gross		0.9
Tax effected operating loss carryforwards		0.2
Federal [Member] | No Expiration Date [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, gross		0.0
Tax effected operating loss carryforwards		0.0
State [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, gross		56.3
Tax effected operating loss carryforwards, valuation allowances		0.0
Deferred Tax Assets, Operating Loss Carryforwards net of federal tax benefit on State Losses		4.5
Tax effected operating loss carryforwards, net		4.5
State [Member] | Within One Year [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, gross		0.0
Tax effected operating loss carryforwards		0.0
State [Member] | In Five or More Years [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, gross		56.3
Tax effected operating loss carryforwards		4.5
State [Member] | No Expiration Date [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, gross		0.0
Tax effected operating loss carryforwards		0.0
International [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, gross		173.9
Tax effected operating loss carryforwards		41.4
Tax effected operating loss carryforwards, valuation allowances		(3.0)
Tax effected operating loss carryforwards, net		38.4
International [Member] | Within One Year [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, gross		0.0
Tax effected operating loss carryforwards		0.0
International [Member] | In Five or More Years [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, gross		0.7
Tax effected operating loss carryforwards		0.2
International [Member] | No Expiration Date [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, gross		173.2
Tax effected operating loss carryforwards		$ 41.2

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible operating loss and tax credit carryforwards.

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The cumulative amount after valuation allowances of future tax effects arising from the unused tax credit carryforward that cannot be utilized on the tax return during a year that may be carried forward to reduce taxable income or taxes payable in a future year; a tax credit carryforward is the amount by which tax credits available for utilization exceed statutory limitations.

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