Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 25, 2022	Dec. 31, 2023	Dec. 25, 2022
Goodwill [Roll Forward]
Beginning goodwill		$ 3,470.1	$ 3,419.6
Acquired during the period			64.7
Impairment during the period	$ (11.8)	(1,191.2)	(11.8)
Foreign exchange translation		0.3	(2.4)
Ending goodwill		2,279.2	3,470.1
Consumer Products
Goodwill [Roll Forward]
Beginning goodwill		1,584.7	1,584.9
Acquired during the period			0.0
Impairment during the period		0.0	0.0
Foreign exchange translation		(2.4)	(0.2)
Ending goodwill		1,582.3	1,584.7
Wizards of the Coast and Digital Gaming
Goodwill [Roll Forward]
Beginning goodwill		371.5	307.3
Acquired during the period			64.7
Impairment during the period		0.0	0.0
Foreign exchange translation		0.2	(0.5)
Ending goodwill		371.7	371.5
Entertainment
Goodwill [Roll Forward]
Beginning goodwill		1,513.9	1,527.4
Acquired during the period			0.0
Impairment during the period		(1,191.2)	(11.8)
Foreign exchange translation		2.5	(1.7)
Ending goodwill		$ 325.2	$ 1,513.9