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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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- Definition 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. + References No definition available. + Details
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