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Revenue and Segment Information - Segment Information Of Revenues, Gross Profit And 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 Information [Line Items]
Revenue	$ 1,213.5	$ 1,347.7	$ 2,491.4	$ 2,734.3
Gross profit for reportable segments	390.6	506.3	806.8	1,030.3
PSG
Segment Reporting Information [Line Items]
Revenue	618.4	700.9	1,242.3	1,405.1
Gross profit for reportable segments	184.2	255.7	362.8	504.7
ASG
Segment Reporting Information [Line Items]
Revenue	426.7	462.0	893.8	956.1
Gross profit for reportable segments	156.1	184.7	330.9	384.8
ISG
Segment Reporting Information [Line Items]
Revenue	168.4	184.8	355.3	373.1
Gross profit for reportable segments	$ 50.3	$ 65.9	$ 113.1	$ 140.8

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