Segment Reporting - Net Revenues by Brand Portfolio (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 25, 2022	Dec. 26, 2021
Revenue from External Customer [Line Items]
Net revenues	$ 5,003.3	$ 5,856.7	$ 6,420.4
Franchise Brands
Revenue from External Customer [Line Items]
Net revenues	3,256.5	3,350.8	3,541.9
Partner Brands
Revenue from External Customer [Line Items]
Net revenues	687.8	1,052.0	1,161.0
Portfolio Brands
Revenue from External Customer [Line Items]
Net revenues	521.3	625.2	719.8
Non-Hasbro Branded Film & TV
Revenue from External Customer [Line Items]
Net revenues	537.7	828.7	997.7
Total Gaming
Revenue from External Customer [Line Items]
Net revenues	2,074.4	1,997.5	2,098.9
MAGIC: THE GATHERING
Revenue from External Customer [Line Items]
Net revenues	$ 1,085.8	$ 1,065.2	$ 992.1