Restructuring (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018	Jun. 30, 2019
Restructuring
Costs incurred	$ 3.4	$ 2.7	$ 3.4
Restructuring reserve
Costs incurred	3.4	2.7	3.4
2018 Actions | Europe
Restructuring
Total expected restructuring costs	$ 5.0		$ 5.0	$ 6.7
Restructuring reserve		2.4
Restructuring reserve
Payments for restructuring		4.1
Balance at the end of the period		$ 2.4