Segment Reporting - Net Revenues by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2021	Sep. 27, 2020	Sep. 26, 2021	Sep. 27, 2020
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	$ 1,970.0	$ 1,776.6	$ 4,407.0	$ 3,742.5
Corporate and Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	201.3	135.7	450.3	329.1
Consumer Products
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	1,282.7	1,317.8	2,625.8	2,409.8
Consumer Products | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	1,282.7	1,317.8	2,625.8	2,409.8
Consumer Products | Affiliate
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(149.6)	(110.1)	(316.8)	(268.8)
Wizards of the Coast and Digital Gaming | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	360.2	273.4	1,008.7	670.7
Wizards of the Coast and Digital Gaming | Affiliate
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(38.0)	(23.4)	(93.1)	(56.4)
Entertainment
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	327.1	185.4	772.5	662.0
Entertainment | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	327.1	185.4	772.5	662.0
Entertainment | Affiliate
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	$ (13.7)	$ (2.2)	$ (40.4)	$ (3.9)