Leases - Narrative (Details) $ in Millions	3 Months Ended					9 Months Ended
	Sep. 28, 2021 USD ($) lease	Jun. 29, 2021 lease	Mar. 30, 2021 lease	Sep. 29, 2020 USD ($)	Jun. 30, 2020 lease	Sep. 28, 2021 USD ($)	Sep. 29, 2020 USD ($)
Leases [Abstract]
Sublease income	$ 0.4			$ 0.2		$ 1.4	$ 0.7
Rent deferred for executed lease amendments				$ 4.2			4.2
Number of restaurant lease assets impaired | lease	0	0	1		1
Asset impairment charge for certain operating leases							$ 0.3