Earnings Per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 27, 2022	Mar. 28, 2021
Basic
Net earnings attributable to Hasbro, Inc.	$ 61.2	$ 116.2
Average shares outstanding, basic (in shares)	139.3	137.7
Net earnings per common share, basic (in dollars per share)	$ 0.44	$ 0.84
Diluted
Net earnings attributable to Hasbro, Inc.	$ 61.2	$ 116.2
Effect of dilutive securities:
Average shares outstanding, basic (in shares)	139.3	137.7
Options and other share-based awards (in shares)	0.3	0.4
Equivalent Shares (in shares)	139.6	138.1
Net earnings per common share, diluted (in dollars per share)	$ 0.44	$ 0.84