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Fair Value of Financial Instruments - Narrative (Details) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 28, 2020 USD ($) | Jun. 28, 2020 USD ($) | Jun. 27, 2021 company
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Loss on available for sale investments, fair value option | $ (0.8) | $ (1.2) |
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 | $ 12.8 | $ 12.8 |

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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 + Details
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