Segment Reporting - Net Revenues by Brand and Entertainment Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2023	Jun. 26, 2022	Jul. 02, 2023	Jun. 26, 2022
Revenue from External Customer [Line Items]
Net revenues	$ 1,210.0	$ 1,339.2	$ 2,211.0	$ 2,502.3
Franchise Brands
Revenue from External Customer [Line Items]
Net revenues	788.4	826.0	1,401.8	1,476.4
Partner Brands
Revenue from External Customer [Line Items]
Net revenues	172.9	219.4	305.6	425.9
Portfolio Brands
Revenue from External Customer [Line Items]
Net revenues	107.1	135.8	199.1	248.4
Non-Hasbro Branded Film & TV
Revenue from External Customer [Line Items]
Net revenues	141.6	158.0	304.5	351.6
Wizards of the Coast and Digital Gaming
Revenue from External Customer [Line Items]
Net revenues	375.6	419.8	670.8	682.6
Wizards of the Coast and Digital Gaming | Tabletop Gaming
Revenue from External Customer [Line Items]
Net revenues	298.5	361.8	516.4	554.0
Wizards of the Coast and Digital Gaming | Digital and Licensed Gaming
Revenue from External Customer [Line Items]
Net revenues	77.1	58.0	154.4	128.6
Entertainment
Revenue from External Customer [Line Items]
Net revenues	179.2	185.2	364.6	412.7
Entertainment | Film & TV
Revenue from External Customer [Line Items]
Net revenues	153.3	148.2	321.7	338.4
Entertainment | Family Brands
Revenue from External Customer [Line Items]
Net revenues	25.9	22.8	42.9	46.0
Entertainment | Music and Other
Revenue from External Customer [Line Items]
Net revenues	$ 0.0	$ 14.2	$ 0.0	$ 28.3