Segment Reporting - Net Revenues by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 28, 2021	Mar. 29, 2020
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	$ 1,114.8	$ 1,105.6
Corporate and Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(109.8)	(71.6)
Consumer Products
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	653.9	572.5
Consumer Products | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	653.9	572.5
Consumer Products | Affiliate
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	70.3	55.6
Wizards of the Coast & Digital Gaming | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	242.2	210.6
Wizards of the Coast & Digital Gaming | Affiliate
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	25.4	15.1
Entertainment
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	218.7	322.5
Entertainment | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	218.7	322.5
Entertainment | Affiliate
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	$ 14.1	$ 0.9