Segment Reporting - Segment Reporting Information by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Dec. 25, 2022
Segment Reporting Information [Line Items]
Revenues	$ 4,745.9	$ 5,710.6	$ 6,666.5
Less: Intersegment revenue	610.4	707.3	809.8
Total net revenues	4,135.5	5,003.3	5,856.7
Cost of sales	1,179.5	1,706.0	1,911.8
Program cost amortization	49.3	448.9	555.5
Royalties	284.2	428.3	493.0
Advertising	319.5	358.4	387.3
Amortization of intangible amortization	68.3	83.0	105.3
Distribution	199.2	225.6	247.6
Managed Expense	1,345.5	3,291.9	1,748.5
Operating profit (loss)	690.0	(1,538.8)	407.7
Reconciliation to Earnings (loss) before income taxes:
Interest expense	171.2	186.3	171.0
Interest income	(47.3)	(23.0)	(11.8)
Other expense (income), net	69.1	7.0	(13.0)
Earnings (loss) before income taxes	497.0	(1,709.1)	261.5
Selling, distribution and administration	1,213.2	1,480.4	1,666.1
Revision of Prior Period, Error Correction, Adjustment
Segment Reporting Information [Line Items]
Cost of sales	26.7
Reconciliation to Earnings (loss) before income taxes:
Selling, distribution and administration	31.1
Corporate and Other
Segment Reporting Information [Line Items]
Revenues	161.2	187.2	225.9
Less: Intersegment revenue	161.2	187.2	225.9
Total net revenues	0.0	0.0	0.0
Cost of sales	(27.4)	1.1	0.0
Program cost amortization	0.0	0.0	0.0
Royalties	3.1	0.1	5.8
Advertising	0.0	1.7	1.8
Amortization of intangible amortization	0.3	0.6	(1.7)
Distribution	2.1	0.2	(0.1)
Managed Expense	77.6	84.6	364.8
Operating profit (loss)	(55.7)	(88.3)	(370.6)
Consumer Products | Operating Segments
Segment Reporting Information [Line Items]
Revenues	2,786.1	3,171.1	3,926.4
Less: Intersegment revenue	242.2	284.7	353.9
Total net revenues	2,543.9	2,886.4	3,572.5
Cost of sales	931.2	1,371.0	1,586.7
Program cost amortization	0.0	0.0	0.0
Royalties	297.3	315.0	385.3
Advertising	223.3	227.8	273.4
Amortization of intangible amortization	44.5	53.3	68.1
Distribution	165.7	197.2	221.2
Managed Expense	766.6	786.8	820.5
Operating profit (loss)	115.3	(64.7)	217.3
Wizards of the Coast and Digital Gaming
Segment Reporting Information [Line Items]
Total net revenues	1,511.3	1,457.6	1,325.1
Wizards of the Coast and Digital Gaming | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,666.0	1,641.2	1,497.6
Less: Intersegment revenue	154.7	183.6	172.5
Total net revenues	1,511.3	1,457.6	1,325.1
Cost of sales	269.9	321.9	278.6
Program cost amortization	0.0	3.5	0.0
Royalties	42.3	57.4	20.5
Advertising	95.2	92.6	90.6
Amortization of intangible amortization	8.2	7.7	4.7
Distribution	31.4	28.2	26.5
Managed Expense	432.3	420.6	365.9
Operating profit (loss)	632.0	525.7	538.3
Entertainment
Segment Reporting Information [Line Items]
Total net revenues	80.3	659.3	959.1
Entertainment | Operating Segments
Segment Reporting Information [Line Items]
Revenues	132.6	711.1	1,016.6
Less: Intersegment revenue	52.3	51.8	57.5
Total net revenues	80.3	659.3	959.1
Cost of sales	5.8	12.0	46.5
Program cost amortization	49.3	445.4	555.5
Royalties	(58.5)	55.8	81.4
Advertising	1.0	36.3	21.5
Amortization of intangible amortization	15.3	21.4	34.2
Distribution	0.0	0.0	0.0
Managed Expense	69.0	1,999.9	197.3
Operating profit (loss)	$ (1.6)	$ (1,911.5)	$ 22.7