Summary of Significant Accounting Policies - Schedule of Earnings per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 25, 2022	Dec. 26, 2021	Dec. 27, 2020
Basic
Net earnings attributable to Hasbro, Inc., basic	$ 203.5	$ 428.7	$ 222.5
Average shares outstanding, basic (in shares)	138.7	138.0	137.3
Net earnings attributable to Hasbro, Inc. (in dollars per share)	$ 1.47	$ 3.11	$ 1.62
Diluted
Net earnings attributable to Hasbro, Inc., diluted	$ 203.5	$ 428.7	$ 222.5
Effect of dilutive securities:
Average shares outstanding, basic (in shares)	138.7	138.0	137.3
Options and other share-based awards (in shares)	0.2	0.4	0.3
Equivalent shares, diluted (in shares)	138.9	138.4	137.6
Net earnings attributable to Hasbro, Inc. (in dollars per share)	$ 1.46	$ 3.10	$ 1.62