Consolidated Statements of Comprehensive Earnings (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ (67,810)	$ 26,727
Other comprehensive earnings (loss):
Foreign currency translation adjustments	(131,767)	6,993
Unrealized holding (losses) gains on available-for-sale securities, net of tax	(410)	265
Net gains on cash flow hedging activities, net of tax	25,015	6,592
Reclassifications to earnings (loss), net of tax:
Net gains on cash flow hedging activities	(3,664)	(2,814)
Amortization of unrecognized pension and postretirement amounts	274	1,139
Total other comprehensive earnings (loss), net of tax	(110,552)	12,175
Total comprehensive earnings attributable to noncontrolling interests	1,827	0
Total comprehensive earnings (loss) attributable to Hasbro, Inc.	$ (180,189)	$ 38,902