Revenue Recognition - Contract Liabilities (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Sep. 29, 2019	Sep. 30, 2018	Jan. 01, 2019	Jan. 01, 2018
Contract with Customer, Asset
Contract Assets	$ 0.1	$ 0.1	$ 0.3	$ 1.8	$ 1.4	$ 1.7	$ 0.1	$ 1.8	$ 1.0	$ 0.6
Change in period		(0.2)	(0.7)	0.4	(0.3)	1.1
Contract Liabilities
Contract Liabilities - Current	11.8	12.1	11.4	11.2	11.6	11.5	11.8	11.2	11.3	11.3
Increase (decrease) - Current Liabilities	(0.3)	0.7	0.1	(0.4)	0.1	0.2
Current Liabilities - Noncurrent	3.0	2.8	$ 2.7	2.7	2.7	2.4	3.0	2.7	$ 2.7	$ 2.1
Increase (decrease) - Noncurrent Liabilities	0.2	$ 0.1			$ 0.3	$ 0.3
Revenue recognized, contract liability	$ 3.1			$ 5.4			9.2	$ 11.5
Impairment loss related to Contract Assets							$ 0.0