Leases - Future Minimum Annual Rental Income Payments (Details) $ in Millions	Sep. 25, 2021 USD ($)
Leases [Abstract]
Sub lease Rental income current	$ 3.1
Sub lease rental income due in 2 years	3.0
Sub lease rental income due in 3 years	3.0
Sub lease rental income due in 4 years	2.0
Sub lease rental income due in 5years	0.9
Sub lease rental income due thereafter	2.3
Sub lease rental income	$ 14.3