Revenue Recognition - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 29, 2024 USD ($) brand_category	Dec. 31, 2023 USD ($)	Dec. 25, 2022 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Assets disposed		$ 402.3
Revenue recognized related to contract liability balance		134.2	$ 89.9
Liabilities disposed		25.8
Number of brand categories | brand_category	3
Net revenues	$ 4,135.5	5,003.3	$ 5,856.7
Non-Hasbro Branded Film & TV brands
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net revenues		$ 0.5
Amazon.com, Inc. | Revenue Benchmark | Customer Concentration Risk
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage (as a percent)	11.00%	11.00%	10.00%
Walmart, Inc. | Revenue Benchmark | Customer Concentration Risk
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percentage (as a percent)	12.00%	11.00%	11.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-12-30
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue, remaining performance obligation, amount	$ 2.6
Revenue, remaining performance obligation, period (in years)	1 year