Equity Method Investment (Details) - USD ($)	1 Months Ended	3 Months Ended		12 Months Ended
	Oct. 31, 2009	Dec. 29, 2024	Dec. 31, 2023	Dec. 29, 2024	Dec. 31, 2023	Dec. 25, 2022	Sep. 23, 2014
Schedule of Equity Method Investments [Line Items]
Change in value of joint venture option agreement				$ 0
Income (loss) from equity method investments				$ (78,200,000)	$ 0	$ 0
Discovery Family Channel
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership (as a percent)	50.00%						40.00%
Payments to acquire interest in joint venture	$ 300,000,000.0
Option agreement, exercise price, as percentage of fair market value of equity method investee (as a percent)		80.00%		80.00%
Impairment loss		$ 80,000,000	$ 1,300,000
Equity method investments		5,600,000	102,000,000.0	$ 5,600,000	102,000,000.0
Discovery Family Channel | Other Liabilities
Schedule of Equity Method Investments [Line Items]
Option agreement		0	1,700,000	0	1,700,000
Discovery Family Channel | Other Expense (Income)
Schedule of Equity Method Investments [Line Items]
Change in value of joint venture option agreement				1,800,000	0	0
Discovery Family Channel | Other Expense
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments				9,400,000	10,900,000	8,100,000
Discovery Family Channel | Warner Bros. Discovery
Schedule of Equity Method Investments [Line Items]
Joint venture, ownership interest (as a percent)							60.00%
Warner Bros. Discovery
Schedule of Equity Method Investments [Line Items]
Payments made under tax sharing agreement				6,700,000	5,700,000	$ 5,400,000
Warner Bros. Discovery | Other Liabilities
Schedule of Equity Method Investments [Line Items]
Remaining present value of expected future payments		$ 3,000,000.0	$ 9,000,000.0	$ 3,000,000.0	$ 9,000,000.0