Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Fair Value Measurements - Nonrecurring (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 28, 2019	Mar. 29, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset impairment, net	$ 0.5		$ 18.3	$ 3.3	$ 18.3
Fair Value Measurements Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	1.4			1.4
Fair Value Measurements Nonrecurring \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	0.0			0.0
Fair Value Measurements Nonrecurring \| Significant Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	0.0			0.0
Fair Value Measurements Nonrecurring \| Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	1.4			1.4
Fair Value Measurements Nonrecurring \| Significant Unobservable Inputs (Level 3) \| Impairment of equity investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset impairment, net	0.1	$ 2.8
Fair Value Measurements Nonrecurring \| Reported Value Measurement \| Significant Unobservable Inputs (Level 3) \| Impairment of equity investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure		4.2
Equity Securities \| Fair Value Measurements Nonrecurring \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	0.0			0.0
Equity Securities \| Fair Value Measurements Nonrecurring \| Significant Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	0.0			0.0
Equity Securities \| Fair Value Measurements Nonrecurring \| Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	$ 1.4	$ 1.4		$ 1.4