Benefit Plans - Weighted Average Assumptions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.80%	3.00%	3.70%
Expected return on plan assets	4.20%	4.50%	4.90%
Compensation increase rate	5.00%	4.50%	5.30%
Discount rate	3.10%	3.10%	2.60%
Compensation increase rate	4.60%	5.00%	4.50%
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 99.6	$ 60.5