Restructuring Charges (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0.8	$ 5.2	$ 1.9	$ 26.7
Restructuring Reserve [Roll Forward]
Beginning balance	9.8	23.8	19.6	24.0
Additional charges	0.8	5.2	1.9	23.3
Payments	(2.9)	(7.0)	(13.8)	(25.0)
Non-cash adjustments	0.2	(0.5)	0.2	(0.8)
Ending balance	$ 7.9	$ 21.5	$ 7.9	21.5
CSCI
Restructuring Cost and Reserve [Line Items]
Restructuring charges				$ 10.8

Restructuring, Additional Charges

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- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of decrease in the reserve for full or partial settlement through consideration other than cash.

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