Revenue - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2020 USD ($) salesChannel	Sep. 27, 2019 USD ($)	Oct. 02, 2020 USD ($) salesChannel	Sep. 27, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Revenue [Abstract]
Contract liability	$ 30.4	$ 15.6	$ 30.4	$ 15.6	$ 14.8	$ 13.0
Revenue recognized, contract liability	4.5	$ 4.8	13.2	$ 13.0
Contract liability, one time advance payments	$ 11.8		$ 11.8
Number of Sales Channels | salesChannel	3		3