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Revenue and Segment Information - Reconciliations Of Segment Gross Profit And Segment Operating Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2020	Jun. 28, 2019	Jul. 03, 2020	Jun. 28, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross profit for reportable segments	$ 390.6	$ 506.3	$ 806.8	$ 1,030.3
Gross profit	374.3	499.0	777.0	1,012.7
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross profit for reportable segments	390.6	506.3	806.8	1,030.3
Segment Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Less: Unallocated manufacturing costs	$ (16.3)	$ (7.3)	$ (29.8)	$ (17.6)

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