Consolidated Statements of Shareholders' Equity and Redeemable Noncontrolling Interests - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Noncontrolling Interests
Beginning balance at Dec. 25, 2022	$ 2,861.9	$ 110.1	$ 2,540.6	$ 4,071.4	$ (254.9)	$ (3,634.4)	$ 29.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss) earnings attributable to Hasbro, Inc.	(22.1)			(22.1)
Net earnings attributable to noncontrolling interests	0.4						0.4
Other comprehensive earnings (loss)	17.5				17.5
Stock-based compensation transactions	(14.0)		(19.0)			5.0
Stock-based compensation expense	15.7		15.7
Dividends declared	(97.0)		0.5	(97.5)
Distributions paid to noncontrolling owners and other foreign exchange	(1.6)						(1.6)
Buyout of redeemable noncontrolling interest	(2.1)		(2.1)
Ending balance at Apr. 02, 2023	2,758.7	110.1	2,535.7	3,951.8	(237.4)	(3,629.4)	27.9
Beginning balance at Dec. 31, 2023	1,087.0	110.1	2,590.6	2,188.4	(201.5)	(3,625.7)	25.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss) earnings attributable to Hasbro, Inc.	58.2			58.2
Net earnings attributable to noncontrolling interests	0.9						0.9
Other comprehensive earnings (loss)	(1.8)				(1.8)
Stock-based compensation transactions	(10.0)		(16.9)			6.9
Stock-based compensation expense	(5.0)		(5.0)
Dividends declared	(97.4)		1.2	(98.6)
Distributions paid to noncontrolling owners and other foreign exchange	(2.0)						(2.0)
Ending balance at Mar. 31, 2024	$ 1,029.9	$ 110.1	$ 2,569.9	$ 2,148.0	$ (203.3)	$ (3,618.8)	$ 24.0