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Income Taxes - Tax Benefits (Expense) (Details) - USD ($) $ in Millions	6 Months Ended
	Jul. 04, 2020	Jun. 29, 2019
Income Tax Disclosure [Abstract]
Restructuring charges and various other items	$ 31.1	$ 26.6
Valuation allowances on deferred tax assets of foreign subsidiaries	(22.0)	(10.4)
Share-based compensation	(0.2)	3.2
Change in tax status of certain affiliates	0.0	18.4
Income tax benefits (expense) related to significant discrete items	$ 8.9	$ 37.8

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Income Tax Expense (Benefit), Discrete Items

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=120406818&loc=d3e32059-109318

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

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