Revenue from Contracts with Customers and Accounts Receivable - Summary of Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jul. 02, 2026	Jun. 26, 2025	Jul. 02, 2026	Jun. 26, 2025
Disaggregation of Revenue [Line Items]
Revenue	$ 58.4	$ 51.8	$ 92.4	$ 86.6
National advertising revenue
Disaggregation of Revenue [Line Items]
Revenue	44.9	41.2	72.3	68.6
Local and regional advertising revenue
Disaggregation of Revenue [Line Items]
Revenue	9.5	6.4	13.9	11.2
ESA advertising revenue from beverage concessionaire agreements
Disaggregation of Revenue [Line Items]
Revenue	$ 4.0	$ 4.2	$ 6.2	$ 6.8

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.

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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