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Restructuring - Narrative (Details) - USD ($) $ in Millions	6 Months Ended
	Jul. 04, 2020	Jun. 29, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 70.2
Carrying values in excess of estimated fair values	10.4
Impairment of right of use assets	2.0
Expected restructuring costs	48.0
Employee termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	53.1
Fixed asset impairment charges
Restructuring Cost and Reserve [Line Items]
Restructuring charges	12.4	$ 3.6
Contract termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.6
Other related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	4.1
Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	49.5
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	18.0
Other expense, net
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2.7

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Amount of loss from impairment of right-of-use asset from operating lease.

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