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Restructuring - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 04, 2020	Mar. 30, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 32.6
Carrying values in excess of estimated fair values	10.4
Expected restructuring costs	46.0
Employee termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	20.0
Fixed asset impairment charges
Restructuring Cost and Reserve [Line Items]
Restructuring charges	10.4	$ 2.1
Contract termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.2
Other related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2.0
Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	28.2
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 4.4

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