Consolidated Statements of Comprehensive Earnings - USD ($) $ in Millions	12 Months Ended
	Dec. 26, 2021	Dec. 27, 2020	Dec. 29, 2019
Statement of Comprehensive Income [Abstract]
Net earnings	$ 435.3	$ 225.4	$ 520.5
Other comprehensive earnings (loss):
Foreign currency translation adjustments, net of tax	(61.9)	10.1	9.6
Unrealized holding (losses) gains on available-for-sale securities, net of tax	(0.1)	0.6	0.5
Net gains on cash flow hedging activities, net of tax	13.5	2.4	11.7
Changes in unrecognized pension amounts, net of tax	3.4	(6.6)	14.9
Reclassifications to earnings, net of tax:
Net losses (gains) on cash flow hedging activities	2.6	(19.3)	(18.5)
Amortization of unrecognized pension and postretirement amounts	2.2	2.0	6.2
Settlement of U.S. defined benefit plan	0.0	0.0	85.9
Other comprehensive earnings	(40.3)	(10.8)	110.3
Total comprehensive earnings, net of tax	395.0	214.6	630.8
Total comprehensive earnings attributable to noncontrolling Interests	6.6	2.9	0.0
Total comprehensive earnings attributable to Hasbro, Inc.	$ 388.4	$ 211.7	$ 630.8