Fair Value of Financial Instruments - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 26, 2021	Dec. 27, 2020	Dec. 29, 2019
Fair Value Disclosures [Abstract]
Net (losses) gains on change of fair value option investments		$ (0.3)	$ 1.9
The Network, Joint Venture
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain on change in value of joint venture option agreement	$ 20.1	$ 1.5	$ 1.3

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

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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration