Consolidated Statements of Comprehensive Earnings (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 223.3	$ (170.4)	$ 420.9	$ (427.0)
Other comprehensive earnings (loss):
Foreign currency translation adjustments, net of tax	(1.4)	(2.7)	(28.1)	46.4
Net gains (losses) on cash flow hedging activities, net of tax	(4.2)	5.0	0.7	(2.2)
Reclassifications to earnings, net of tax:
Net gains on cash flow hedging activities	0.1	2.9	1.2	2.5
Amortization of unrecognized pension and postretirement amounts	(0.1)	(0.1)	(0.1)	(0.2)
Total other comprehensive (loss) earnings, net of tax	(5.6)	5.1	(26.3)	46.5
Total comprehensive earnings attributable to noncontrolling interests	0.1	0.7	1.0	1.2
Total comprehensive earnings (loss) attributable to Hasbro, Inc.	$ 217.6	$ (166.0)	$ 393.6	$ (381.7)