Revenue Recognition - Net Revenues by Brand Portfolio (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Revenue from External Customer [Line Items]
Net revenues	$ 1,281.3	$ 1,503.4	$ 3,033.9	$ 3,714.4
Franchise Brands
Revenue from External Customer [Line Items]
Net revenues	941.6	1,011.0	2,334.7	2,412.8
Partner Brands
Revenue from External Customer [Line Items]
Net revenues	190.1	228.2	402.4	533.8
Portfolio Brands
Revenue from External Customer [Line Items]
Net revenues	149.6	170.6	296.8	370.6
Non-Hasbro Branded Film & TV
Revenue from External Customer [Line Items]
Net revenues	$ 0.0	$ 93.6	$ 0.0	$ 397.2