Earnings (Loss) Per Share - Schedule of Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Apr. 02, 2023	Mar. 27, 2022
Basic
Net (loss) earnings attributable to Hasbro, Inc.	$ (22.1)	$ 61.2
Average shares outstanding, basic (in shares)	138.6	139.3
Net earnings (loss) per common share, basic (in dollars per share)	$ (0.16)	$ 0.44
Diluted
Net (loss) earnings attributable to Hasbro, Inc.	$ (22.1)	$ 61.2
Effect of dilutive securities:
Average shares outstanding, basic (in shares)	138.6	139.3
Options and other share-based awards (in shares)	0.0	0.3
Equivalent Shares (in shares)	138.6	139.6
Net earnings (loss) per common share, diluted (in dollars per share)	$ (0.16)	$ 0.44