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Income Taxes Carryforwards (Details) - USD ($) $ in Millions | Feb. 23, 2018 | Feb. 24, 2017 | Feb. 26, 2016 | Feb. 27, 2015
--- | --- | --- | --- | ---
Operating Loss Carryforwards [Line Items] |  |  |  |
Liability for Uncertain Tax Positions presented net in underlying deferred tax asset | $ 2.2 |  |  |
Tax effected operating loss carryforwards | 55.8 | $ 57.0 |  |
Tax effected operating loss carryforwards, valuation allowances | (7.8) |  |  |
Deferred Tax Assets, Operating Loss Carryforwards net of federal tax benefit on State Losses | 55.8 |  |  |
Tax effected operating loss carryforwards, net | 48.0 |  |  |
Tax credit carryforwards | 31.8 | 17.4 |  |
Tax credit carryforward, valuation allowance | (1.7) |  |  |
Tax credit carryforwards, net | 30.1 |  |  |
Net operating loss and tax credit carryforwards | 78.1 |  |  |
Unrecognized Tax Benefits | 2.2 | $ 2.8 | $ 8.6 | $ 8.8
Within One Year [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Tax effected operating loss carryforwards | 0.6 |  |  |
Tax credit carryforwards | 0.0 |  |  |
In Five or More Years [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Tax effected operating loss carryforwards | 1.9 |  |  |
Tax credit carryforwards | 31.8 |  |  |
No Expiration Date [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Tax effected operating loss carryforwards | 53.3 |  |  |
Tax credit carryforwards | 0.0 |  |  |
Federal [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards, gross | 0.0 |  |  |
Tax effected operating loss carryforwards | 0.0 |  |  |
Tax effected operating loss carryforwards, valuation allowances | 0.0 |  |  |
Tax effected operating loss carryforwards, net | 0.0 |  |  |
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 | 0.0 |  |  |
Tax effected operating loss carryforwards | 0.0 |  |  |
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 | 17.0 |  |  |
Tax effected operating loss carryforwards, valuation allowances | (0.5) |  |  |
Deferred Tax Assets, Operating Loss Carryforwards net of federal tax benefit on State Losses | 1.9 |  |  |
Tax effected operating loss carryforwards, net | 1.4 |  |  |
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 | 17.0 |  |  |
Tax effected operating loss carryforwards | 1.9 |  |  |
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 | 219.7 |  |  |
Tax effected operating loss carryforwards | 53.9 |  |  |
Tax effected operating loss carryforwards, valuation allowances | (7.3) |  |  |
Tax effected operating loss carryforwards, net | 46.6 |  |  |
International [Member] | Within One Year [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards, gross | 2.0 |  |  |
Tax effected operating loss carryforwards | 0.6 |  |  |
International [Member] | In Five or More Years [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards, gross | 0.0 |  |  |
Tax effected operating loss carryforwards | 0.0 |  |  |
International [Member] | No Expiration Date [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards, gross | 217.7 |  |  |
Tax effected operating loss carryforwards | $ 53.3 |  |  |

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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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