Revenue Recognition - Contract Liabilities (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 27, 2020	Sep. 29, 2019	Jan. 01, 2020	Jan. 01, 2019
Contract with Customer, Asset
Contract Assets		$ 0.3	$ 0.3	$ 0.1	$ 0.1	$ 0.3		$ 0.1	$ 0.4	$ 1.0
Change in period	$ (0.3)		(0.1)		(0.2)	(0.7)
Contract Liabilities
Contract Liabilities - Current	12.8	11.7	11.7	11.8	12.1	11.4	$ 12.8	11.8	11.5	11.3
Increase (decrease) - Current Liabilities	1.1		0.2	(0.3)	0.7	0.1
Contract Liabilities - Noncurrent	2.7	2.7	2.8	3.0	2.8	$ 2.7	2.7	3.0	$ 2.9	$ 2.7
Increase (decrease) - Noncurrent Liabilities		$ (0.1)	$ (0.1)	0.2	$ 0.1
Revenue recognized, contract liability	2.2			3.1			7.0	9.2
Impairment loss related to Contract Assets	$ 0.0			$ 0.0			$ 0.0	$ 0.0