Introduction (Details) $ in Millions	9 Months Ended
	Sep. 29, 2018 USD ($) country region	Sep. 30, 2017 USD ($)	Dec. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of countries products are sold in (more than) | country	100
Number of regions products are sold in | region	4
Depository receipts ratio	0.76293
Cash flow from operating activities	$ 142.3	$ 149.9
Restricted cash	$ 1.6	1.6	$ 1.6	$ 1.6
Accounting Standards Update 2016-15
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash flow from operating activities		$ (7.3)