Consolidated Statements of Shareholders' Equity - 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 earnings (loss) 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)
Buyout of redeemable noncontrolling interest	(2.1)		(2.1)
Distributions paid to noncontrolling owners and other foreign exchange	(1.6)						(1.6)
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. 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 earnings (loss) attributable to Hasbro, Inc.	(428.2)
Other comprehensive earnings (loss)	46.5
Ending balance at Oct. 01, 2023	2,223.2	110.1	2,574.1	3,348.3	(208.4)	(3,626.3)	25.4
Beginning balance at Apr. 02, 2023	2,758.7	110.1	2,535.7	3,951.8	(237.4)	(3,629.4)	27.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss) attributable to Hasbro, Inc.	(235.0)			(235.0)
Net earnings attributable to noncontrolling interests	0.1						0.1
Other comprehensive earnings (loss)	23.9				23.9
Stock-based compensation transactions	(0.4)		(1.1)			0.7
Stock-based compensation expense	20.9		18.5			2.4
Dividends declared	(97.2)		1.5	(98.7)
Distributions paid to noncontrolling owners and other foreign exchange	(0.8)						(0.8)
Ending balance at Jul. 02, 2023	2,470.2	110.1	2,554.6	3,618.1	(213.5)	(3,626.3)	27.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss) attributable to Hasbro, Inc.	(171.1)			(171.1)
Net earnings attributable to noncontrolling interests	0.7						0.7
Other comprehensive earnings (loss)	5.1				5.1
Stock-based compensation transactions	(1.4)		(1.3)			(0.1)
Stock-based compensation expense	19.3		19.2			0.1
Dividends declared	(97.1)		1.6	(98.7)
Distributions paid to noncontrolling owners and other foreign exchange	(2.5)						(2.5)
Ending balance at Oct. 01, 2023	2,223.2	110.1	2,574.1	3,348.3	(208.4)	(3,626.3)	25.4
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 earnings (loss) 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
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 earnings (loss) attributable to Hasbro, Inc.	419.9
Other comprehensive earnings (loss)	(26.3)
Ending balance at Sep. 29, 2024	1,309.7	110.1	2,609.5	2,408.2	(227.8)	(3,612.8)	22.5
Beginning balance at Mar. 31, 2024	1,029.9	110.1	2,569.9	2,148.0	(203.3)	(3,618.8)	24.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss) attributable to Hasbro, Inc.	138.5			138.5
Other comprehensive earnings (loss)	(18.9)				(18.9)
Stock-based compensation transactions	5.3		2.9			2.4
Stock-based compensation expense	19.8		17.5			2.3
Dividends declared	0.0		1.8	(1.8)
Distributions paid to noncontrolling owners and other foreign exchange	(1.7)						(1.7)
Ending balance at Jun. 30, 2024	1,172.9	110.1	2,592.1	2,284.7	(222.2)	(3,614.1)	22.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss) attributable to Hasbro, Inc.	223.2			223.2
Net earnings attributable to noncontrolling interests	0.1						0.1
Other comprehensive earnings (loss)	(5.6)				(5.6)
Stock-based compensation transactions	2.6		0.6			2.0
Stock-based compensation expense	14.0		14.7			(0.7)
Dividends declared	(97.6)		2.1	(99.7)
Distributions paid to noncontrolling owners and other foreign exchange	0.1						0.1
Ending balance at Sep. 29, 2024	$ 1,309.7	$ 110.1	$ 2,609.5	$ 2,408.2	$ (227.8)	$ (3,612.8)	$ 22.5