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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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