Restructuring Charges (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Restructuring Reserve [Roll Forward]
Beginning balance	$ 12.4	$ 51.5	$ 21.4	$ 19.7
Additional charges	3.7	12.1	5.2	50.8
Payments	(3.1)	(23.6)	(13.8)	(30.7)
Non-cash adjustments	(0.3)	(0.3)	(0.1)	(0.1)
Ending balance	12.7	$ 39.7	12.7	39.7
Employee severance
Restructuring Reserve [Roll Forward]
Ending balance	7.3		7.3
Lease exit
Restructuring Reserve [Roll Forward]
Ending balance	$ 5.4		$ 5.4
CHCA
Restructuring Reserve [Roll Forward]
Additional charges				$ 28.0

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.

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-Publisher FASB
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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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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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