Consolidated Statements of Comprehensive Earnings (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ (32,898)	$ 13,433	$ (100,708)	$ 40,160
Other comprehensive earnings (loss):
Foreign currency translation adjustments, net of tax	(7,197)	3,334	(138,964)	10,327
Unrealized holding gains on available-for-sale securities, net of tax	2,534	290	2,124	555
Net (losses) gains on cash flow hedging activities, net of tax	(3,691)	(2,079)	21,324	4,513
Changes in unrecognized pension amounts, net of tax	0	19,589	0	19,589
Reclassifications to earnings (loss), net of tax:
Net gains on cash flow hedging activities	(5,278)	(1,982)	(8,942)	(4,796)
Amortization of unrecognized pension and postretirement amounts	276	4,160	550	5,299
Settlement of U.S. defined benefit plan	0	85,852	0	85,852
Total other comprehensive earnings (loss), net of tax	(13,356)	109,164	(123,908)	121,339
Total comprehensive earnings attributable to noncontrolling interests	1,017	0	2,844	0
Total comprehensive earnings (loss) attributable to Hasbro, Inc.	$ (47,271)	$ 122,597	$ (227,460)	$ 161,499