Goodwill and Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Dec. 25, 2022
Goodwill [Roll Forward]
Beginning goodwill	$ 2,279.2	$ 3,470.1
Impairment during the period	0.0	(1,191.2)	$ 0.0
Foreign exchange translation	(1.0)	0.3
Ending goodwill	2,278.2	2,279.2	3,470.1
Consumer Products
Goodwill [Roll Forward]
Beginning goodwill	1,582.3	1,584.7
Impairment during the period		0.0
Foreign exchange translation	(0.3)	(2.4)
Ending goodwill	1,582.0	1,582.3	1,584.7
Wizards of the Coast and Digital Gaming
Goodwill [Roll Forward]
Beginning goodwill	371.7	371.5
Impairment during the period		0.0
Foreign exchange translation	(0.7)	0.2
Ending goodwill	371.0	371.7	371.5
Entertainment
Goodwill [Roll Forward]
Beginning goodwill	325.2	1,513.9
Impairment during the period		(1,191.2)
Foreign exchange translation	0.0	2.5
Ending goodwill	$ 325.2	$ 325.2	$ 1,513.9