Consolidated Statements of Comprehensive Earnings (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Dec. 25, 2022
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 394.4	$ (1,487.8)	$ 203.0
Other comprehensive (loss) earnings:
Foreign currency translation adjustments	(48.8)	59.4	(45.4)
Unrealized holding losses on available-for-sale securities, net of tax	0.0	0.0	(0.3)
Net gains (losses) on cash flow hedging activities, net of tax	7.3	(8.6)	10.2
Changes in unrecognized pension amounts, net of tax	(2.9)	(0.9)	30.8
Reclassifications to earnings, net of tax:
Net gains (losses) on hedging activities	0.4	3.8	(16.2)
Amortization of unrecognized pension and postretirement amounts	(0.9)	(0.3)	1.3
Other comprehensive (loss) earnings, net of tax	(44.9)	53.4	(19.6)
Total comprehensive earnings (loss), net of tax	349.5	(1,434.4)	183.4
Total comprehensive earnings (loss) attributable to noncontrolling interests	8.8	1.5	(0.5)
Total comprehensive earnings (loss) attributable to Hasbro, Inc.	$ 340.7	$ (1,435.9)	$ 183.9