Segment Reporting - Operating Profit (Loss) by Segments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2023	Sep. 25, 2022	Oct. 01, 2023	Sep. 25, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating profit (loss)	$ (169.5)	$ 194.3	$ (340.2)	$ 533.4
Interest expense	47.1	41.9	140.0	125.2
Interest income	(3.8)	(3.2)	(15.6)	(8.0)
Other non-operating expense (income)	2.2	(10.0)	(0.7)	(9.5)
Earnings (loss) before income taxes	(215.0)	165.6	(463.9)	425.7
Corporate and Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating profit (loss)	(0.5)	(15.8)	(22.8)	(37.3)
Consumer Products | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating profit (loss)	96.1	136.8	61.5	138.9
Wizards of the Coast and Digital Gaming | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating profit (loss)	203.4	102.2	422.5	434.2
Entertainment | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating profit (loss)	$ (468.5)	$ (28.9)	$ (801.4)	$ (2.4)