Segment Reporting - Net Revenues by Category (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 25, 2022	Dec. 26, 2021
Revenue from External Customer [Line Items]
Net revenues	$ 5,003.3	$ 5,856.7	$ 6,420.4
Wizards of the Coast and Digital Gaming
Revenue from External Customer [Line Items]
Net revenues	1,457.6	1,325.1	1,286.6
Wizards of the Coast and Digital Gaming | Tabletop Gaming
Revenue from External Customer [Line Items]
Net revenues	1,072.5	1,067.0	950.6
Wizards of the Coast and Digital Gaming | Digital and Licensed Gaming
Revenue from External Customer [Line Items]
Net revenues	385.1	258.1	336.0
Entertainment
Revenue from External Customer [Line Items]
Net revenues	659.3	959.1	1,152.2
Entertainment | Film and TV
Revenue from External Customer [Line Items]
Net revenues	575.5	837.6	932.5
Entertainment | Family Brands
Revenue from External Customer [Line Items]
Net revenues	83.8	79.4	132.9
Entertainment | Music and Other
Revenue from External Customer [Line Items]
Net revenues	$ 0.0	$ 42.1	$ 86.8