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Goodwill and Intangible Assets - Summary of Changes in Goodwill (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jun. 29, 2018	Sep. 28, 2018
Goodwill [Roll Forward]
Net balance as of December 31, 2017		$ 916.9
Addition due to business combination		18.9
Goodwill impairment	$ (3.3)	(3.3)
Net balance as of September 28, 2018		$ 932.5

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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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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