Quarterly Financial Data (Unaudited – see accompanying accountants’ report) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 29, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$ 1,428,007	$ 1,575,173	$ 984,537	$ 732,510	$ 1,389,161	$ 1,569,686	$ 904,458	$ 716,341	$ 4,720,227	$ 4,579,646	$ 5,209,782
Operating profit(a)	190,380	297,210	128,333	36,127	10,547	313,336	87,588	(80,419)	652,050	331,052	810,359
Earnings before income taxes	298,761	259,746	6,108	29,595	(5,128)	295,794	68,124	(88,388)	594,210	270,402
Net earnings attributable to Hasbro, Inc.	$ 267,345	$ 212,949	$ 13,433	$ 26,727	$ 8,766	$ 263,861	$ 60,299	$ (112,492)	$ 520,454	$ 220,434	$ 396,607
Net earnings (loss)
Basic (in dollars per share)	$ 2.02	$ 1.68	$ 0.11	$ 0.21	$ 0.07	$ 2.08	$ 0.48	$ (0.90)	$ 4.07	$ 1.75	$ 3.17
Diluted (in dollars per share)	2.01	1.67	0.11	0.21	0.07	2.06	0.48	(0.90)	4.05	1.74	3.12
Market price
High (in dollars per share)	123.05	126.87	108.86	93.19	107.57	109.60	93.00	103.39	126.87	109.60
Low (in dollars per share)	92.59	103.04	84.61	77.34	76.84	91.70	79.00	83.56	77.34	76.84
Cash dividends declared	$ 0.68	$ 0.68	$ 0.68	$ 0.68	$ 0.63	$ 0.63	$ 0.63	$ 0.63	$ 2.72	$ 2.52	$ 2.28