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Fair Value of Financial Instruments - Narrative (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 27, 2020 USD ($)	Sep. 27, 2020 USD ($)	Sep. 26, 2021 company
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Gain (loss) on available for sale investments, fair value option	$ 1.1	$ (0.1)
Number of companies quoted on an active public market | company			1
Fair Value, Recurring
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Available-for-sale investments, elected fair value option	$ 13.4	$ 13.4

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- Definition

Available for sale investments for which the fair value option was elected.

+ References

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+ Details

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- Definition

Number of Companies Quoted on an Active Public Market

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123596393&loc=d3e14172-108612

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