Goodwill - Rollforward of Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 27, 2020	Mar. 29, 2019
Goodwill [Roll Forward]
Beginning balance	$ 8,399.3
Acquisitions	13.2
Impairment of goodwill	(85.3)	$ 0.0
Foreign currency translation and other	(56.1)
Ending balance	8,271.1
Professional Instrumentation
Goodwill [Roll Forward]
Beginning balance	7,242.6
Acquisitions	13.2
Impairment of goodwill	0.0
Foreign currency translation and other	(26.9)
Ending balance	7,228.9
Industrial Technologies
Goodwill [Roll Forward]
Beginning balance	1,156.7
Acquisitions	0.0
Impairment of goodwill	(85.3)
Foreign currency translation and other	(29.2)
Ending balance	$ 1,042.2

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 foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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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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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting 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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