Revenue Recognition - Net Revenues by Brand Portfolio (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Apr. 02, 2023
Revenue from External Customer [Line Items]
Net revenues	$ 757.3	$ 1,001.0
Franchise Brands
Revenue from External Customer [Line Items]
Net revenues	606.5	613.4
Partner Brands
Revenue from External Customer [Line Items]
Net revenues	87.7	132.7
Portfolio Brands
Revenue from External Customer [Line Items]
Net revenues	63.1	92.1
Non-Hasbro Branded Film & TV
Revenue from External Customer [Line Items]
Net revenues	$ 0.0	$ 162.8