Investments in Productions and Investments in Acquired Content Rights - Programming Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 25, 2022
Individual monetization
Released, net of amortization	$ 74.7	$ 584.5
Completed and not released	5.1	23.3
In production	27.1	199.4
Pre-production	10.4	41.3
Individual monetization, costs	117.3	848.5
Film/TV group monetization
Released, net of amortization	26.0	25.8
In production	23.6	22.2
Total film costs	49.6	48.0
Investment in other programming:
Released, net of amortization	16.1	9.8
In production	0.8	11.8
Pre-production	0.8	3.3
Other programming costs	17.7	24.9
Total program investments	184.6	$ 921.4
Productions and investments in acquired	$ 734.8