Segment Reporting - Net Revenues by Brand Portfolio (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 25, 2022	Dec. 26, 2021	Dec. 27, 2020
Revenue from External Customer [Line Items]
Net revenues	$ 5,856.7	$ 6,420.4	$ 5,465.4
Franchise Brands
Revenue from External Customer [Line Items]
Net revenues	2,830.6	2,955.6	2,394.3
Partner Brands
Revenue from External Customer [Line Items]
Net revenues	1,052.0	1,161.0	1,079.4
Hasbro Gaming
Revenue from External Customer [Line Items]
Net revenues	743.3	851.4	814.8
Emerging Brands
Revenue from External Customer [Line Items]
Net revenues	402.1	454.7	372.2
TV/Film/Entertainment
Revenue from External Customer [Line Items]
Net revenues	828.7	997.7	804.7
Gaming including Magic the Gathering and Monopoly
Revenue from External Customer [Line Items]
Net revenues	$ 1,997.5	2,098.9	$ 1,763.8
Peppa Pig
Revenue from External Customer [Line Items]
Net revenues		$ 162.9