Segment Reporting - Net Revenues by Brand and Entertainment Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 27, 2022	Mar. 28, 2021
Revenue from External Customer [Line Items]
Net revenues	$ 1,163.1	$ 1,114.8
Franchise Brands
Revenue from External Customer [Line Items]
Net revenues	543.1	523.1
Partner Brands
Revenue from External Customer [Line Items]
Net revenues	206.5	188.0
Hasbro Gaming
Revenue from External Customer [Line Items]
Net revenues	143.6	136.3
Emerging Brands
Revenue from External Customer [Line Items]
Net revenues	76.4	73.1
TV/Film/Entertainment
Revenue from External Customer [Line Items]
Net revenues	193.5	194.3
Peppa Pig
Revenue from External Customer [Line Items]
Net revenues	31.6
Gaming including Magic the Gathering and Monopoly
Revenue from External Customer [Line Items]
Net revenues	378.8	365.3
Wizards of the Coast and Digital Gaming
Revenue from External Customer [Line Items]
Net revenues	262.8	242.2
Wizards of the Coast and Digital Gaming | Tabletop Gaming
Revenue from External Customer [Line Items]
Net revenues	192.2	175.3
Wizards of the Coast and Digital Gaming | Digital and Licensed Gaming
Revenue from External Customer [Line Items]
Net revenues	70.6	66.9
Entertainment
Revenue from External Customer [Line Items]
Net revenues	227.5	218.7
Entertainment | Film & TV
Revenue from External Customer [Line Items]
Net revenues	190.2	166.4
Entertainment | Family Brands
Revenue from External Customer [Line Items]
Net revenues	23.2	18.8
Entertainment | Music and Other
Revenue from External Customer [Line Items]
Net revenues	$ 14.1	$ 33.5