Earnings (Loss) Per Share - Schedule of Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2023	Jun. 26, 2022	Jul. 02, 2023	Jun. 26, 2022
Basic
Net (loss) earnings attributable to Hasbro, Inc.	$ (235.0)	$ 142.0	$ (257.1)	$ 203.2
Average shares outstanding, basic (in shares)	138.8	139.0	138.7	139.2
Net earnings (loss) per common share, basic (in dollars per share)	$ (1.69)	$ 1.02	$ (1.85)	$ 1.46
Diluted
Net (loss) earnings attributable to Hasbro, Inc.	$ (235.0)	$ 142.0	$ (257.1)	$ 203.2
Average shares outstanding, diluted (in shares)	138.8	139.0	138.7	139.2
Effect of dilutive securities:
Options and other share-based awards (in shares)	0.0	0.2	0.0	0.2
Equivalent shares, diluted (in shares)	138.8	139.2	138.7	139.4
Net earnings (loss) per common share, diluted (in dollars per share)	$ (1.69)	$ 1.02	$ (1.85)	$ 1.46