Subsequent Event (Details) $ in Millions		3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 26, 2021 USD ($)	Jul. 04, 2021 USD ($)	Jun. 28, 2020 USD ($)	Jul. 04, 2021 USD ($)	Jun. 28, 2020 USD ($)	Dec. 31, 2020 USD ($) Employee
Subsequent Event [Abstract]
Revenue		$ 455.6	$ 357.2	$ 908.2	$ 774.7
Normerica Inc. [Member]
Subsequent Event [Abstract]
Number of employees | Employee						300
Revenue						$ 140.0
Subsequent Event [Member] | Normerica Inc. [Member]
Subsequent Event [Abstract]
Acquisition of business	$ 185.0