Inventories (Details 1) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018	Dec. 31, 2018
Inventory Disclosure [Abstract]
LIFO liquidation effect	$ 0.1	$ 0.1	$ 0.1	$ 0.1
Notional Amount of Nonderivative Instruments			$ 295.7		$ 316.1