Segment Reporting - Operating Profit (Loss) by Segments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating profit (loss):	$ 301.9	$ (169.5)	$ 630.2	$ (340.2)
Interest expense	46.2	47.1	127.7	140.0
Interest income	(14.7)	(3.8)	(36.0)	(15.6)
Other non-operating expense (income)	(19.9)	2.2	(15.7)	(0.7)
Earnings (loss) before income taxes	290.3	(215.0)	554.2	(463.9)
Selling, distribution and administration	299.3	352.3	852.6	1,050.0
Cost of sales	378.9	494.5	820.8	1,132.0
Revision of Prior Period, Error Correction, Adjustment
Segment Reporting, Revenue Reconciling Item [Line Items]
Selling, distribution and administration			31.1
Cost of sales			26.7
Corporate and Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating profit (loss):	(10.1)	(0.5)	(0.3)	(22.8)
Corporate and Other | Operational Excellence Program
Segment Reporting, Revenue Reconciling Item [Line Items]
Transformation office and consulting fees	6.0	8.4	18.5	29.4
Consumer Products | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating profit (loss):	121.0	96.1	64.8	61.5
Wizards of the Coast and Digital Gaming | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating profit (loss):	181.2	203.4	551.1	422.5
Entertainment | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating profit (loss):	$ 9.8	$ (468.5)	$ 14.6	$ (801.4)