Income Taxes Carryforwards (Details) - USD ($) $ in Millions	May 24, 2019	Feb. 22, 2019	Feb. 23, 2018	Feb. 24, 2017
Operating Loss Carryforwards [Line Items]
Liability for Uncertain Tax Positions presented net in underlying deferred tax asset	$ 2.0
Tax effected operating loss carryforwards	39.1	$ 46.1
Tax effected operating loss carryforwards, valuation allowances	(3.2)
Deferred Tax Assets, Operating Loss Carryforwards net of federal tax benefit on State Losses	39.3
Tax effected operating loss carryforwards, net	36.1
Tax credit carryforwards	19.1	38.7
Tax credit carryforward, valuation allowance	(2.0)
Tax credit carryforwards, net	17.1
Net operating loss and tax credit carryforwards	53.2
Unrecognized Tax Benefits	2.0	$ 2.0	$ 2.2	$ 2.8
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	0.9
Tax credit carryforwards	19.1
No Expiration Date [Member]
Operating Loss Carryforwards [Line Items]
Tax effected operating loss carryforwards	38.4
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	2.1
Tax effected operating loss carryforwards, valuation allowances	0.0
Deferred Tax Assets, Operating Loss Carryforwards net of federal tax benefit on State Losses	0.7
Tax effected operating loss carryforwards, net	0.7
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	2.1
Tax effected operating loss carryforwards	0.7
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	160.2
Tax effected operating loss carryforwards	38.4
Tax effected operating loss carryforwards, valuation allowances	(3.2)
Tax effected operating loss carryforwards, net	35.2
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	0.0
Tax effected operating loss carryforwards	0.0
International [Member] | No Expiration Date [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, gross	160.2
Tax effected operating loss carryforwards	$ 38.4