Goodwill and Intangible Assets - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 29, 2024	Dec. 29, 2024	Dec. 31, 2023	Dec. 25, 2022
Goodwill [Line Items]
Non-cash goodwill impairment charges		$ 0	$ 1,191,200,000	$ 0
Loss on disposal of business		37,400,000	539,000,000.0	22,100,000
Impairments of indefinite-lived intangible assets	$ 0	0	0
Impairment of intangible assets, finite-lived		$ 0	0
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]		Selling, distribution and administration
Entertainment
Goodwill [Line Items]
Non-cash goodwill impairment charges			1,191,200,000
Loss on disposal of business				$ 11,800,000
Impairment of intangible assets, finite-lived			51,000,000
Film and TV
Goodwill [Line Items]
Impairment of intangible assets, finite-lived			$ 65,000,000