Earnings (Loss) Per Share - Schedule of Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Apr. 02, 2023
Earnings Per Share [Abstract]
Net earnings (loss) attributable to Hasbro, Inc.	$ 58.2	$ (22.1)
Average shares outstanding, basic (in shares)	139.1	138.6
Options and other share-based awards (in shares)	0.2	0.0
Equivalent shares, diluted (in shares)	139.3	138.6
Net earnings (loss) per common share, basic (in dollars per share)	$ 0.42	$ (0.16)
Net earnings (loss) per common share, diluted (in dollars per share)	$ 0.42	$ (0.16)