Consolidated Statements of Comprehensive Earnings (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2023	Sep. 25, 2022	Oct. 01, 2023	Sep. 25, 2022
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ (170.4)	$ 128.2	$ (427.0)	$ 331.6
Other comprehensive earnings (loss):
Foreign currency translation adjustments, net of tax	(2.7)	(72.0)	46.4	(103.0)
Unrealized holding losses on available-for-sale securities, net of tax	0.0	(0.1)	0.0	(0.3)
Net gains (losses) on cash flow hedging activities, net of tax	5.0	12.6	(2.2)	20.6
Reclassifications to earnings, net of tax:
Net losses (gains) on cash flow hedging activities	2.9	(5.9)	2.5	(7.2)
Amortization of unrecognized pension and postretirement amounts	(0.1)	0.1	(0.2)	0.3
Total other comprehensive earnings (loss), net of tax	5.1	(65.3)	46.5	(89.6)
Total comprehensive earnings (loss) attributable to noncontrolling interests	0.7	(1.0)	1.2	(0.8)
Total comprehensive earnings (loss) attributable to Hasbro, Inc.	$ (166.0)	$ 63.9	$ (381.7)	$ 242.8