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Subsequent Events (Narrative) (Details) - USD ($) $ in Millions			3 Months Ended
	Mar. 24, 2020	Feb. 27, 2020	May 30, 2022	Feb. 22, 2020
Restructuring Plan 2020 [Member] | Employee Termination Benefits [Member] | Scenario, Forecast [Member]
Subsequent Event [Line Items]
Restructuring costs			$ 3.0
Subsequent Event [Member] | Restructuring Plan 2020 [Member]
Subsequent Event [Line Items]
Planned workforce reduction		7.50%
Planned real estate reduction		26.00%
Subsequent Event [Member] | Restructuring Plan 2020 [Member] | Employee Termination Benefits [Member]
Subsequent Event [Line Items]
Expected restructuring costs		$ 5.0
Subsequent Event [Member] | Restructuring Plan 2020 [Member] | Employee Termination Benefits [Member] | Maximum [Member]
Subsequent Event [Line Items]
Expected restructuring costs		4.0
Subsequent Event [Member] | Restructuring Plan 2020 [Member] | Lease Termination Costs [Member]
Subsequent Event [Line Items]
Expected restructuring costs		$ 1.0
Credit Facility [Member]
Subsequent Event [Line Items]
Credit facility, remaining borrowing capacity				$ 39.5
Credit Facility [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Proceeds from credit facility	$ 39.0
Revolving Credit Facility [Member] | Credit Facility [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Credit facility, remaining borrowing capacity	0.5
Reducing Revolving Credit Facility [Member] | Credit Facility [Member]
Subsequent Event [Line Items]
Credit facility, remaining borrowing capacity				$ 30.0
Reducing Revolving Credit Facility [Member] | Credit Facility [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Credit facility, remaining borrowing capacity	$ 30.0

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