Goodwill - Changes in the Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 29, 2024	Dec. 31, 2023	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Goodwill [Roll Forward]
Beginning balance		$ 3,238.8		$ 2,279.2	$ 3,470.1
Foreign exchange translation				(0.3)	(0.1)
Impairment during the period	$ 0.0		$ 0.0	0.0	231.2
Ending balance	2,278.9	2,279.2	3,238.8	2,278.9	3,238.8
Goodwill impairment charge		960.0
Consumer Products
Goodwill [Roll Forward]
Beginning balance		1,584.6		1,582.3	1,584.7
Foreign exchange translation				(0.1)	(0.1)
Impairment during the period					0.0
Ending balance	1,582.2	1,582.3	1,584.6	1,582.2	1,584.6
Wizards of the Coast and Digital Gaming
Goodwill [Roll Forward]
Beginning balance		371.5		371.7	371.5
Foreign exchange translation				(0.2)	0.0
Impairment during the period					0.0
Ending balance	371.5	371.7	371.5	371.5	371.5
Entertainment
Goodwill [Roll Forward]
Beginning balance		1,282.7		325.2	1,513.9
Foreign exchange translation				0.0	0.0
Impairment during the period					231.2
Ending balance	$ 325.2	$ 325.2	$ 1,282.7	$ 325.2	$ 1,282.7