The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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Goodwill and Intangible Assets Goodwill and Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 30, 2019	Dec. 29, 2018	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Goodwill [Line Items]
Asset impairments			$ 10.0	$ 8.7	$ 0.0
Amortization			50.3	54.9	$ 55.2
Impairment of intangible assets, finite-lived			4.9
Disposal Group, Disposed of by Sale, Not Discontinued Operations
Goodwill [Line Items]
Asset impairments			5.1
Goodwill \| Hermetic Climate \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Goodwill [Line Items]
Asset impairments		$ 9.5
Customer Relationships
Goodwill [Line Items]
Amortization			39.4
Impairment of intangible assets, finite-lived			4.9
Customer Relationships \| Hermetic Climate \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Goodwill [Line Items]
Asset impairments			$ 4.9	$ 5.5
Impairment of intangible assets, finite-lived	$ 4.9