Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Dec. 30, 2018	Dec. 31, 2017	Dec. 25, 2016
Quarterly Financial Data (Unaudited) [Abstract]
Net revenues, external	$ 1,389,161	$ 1,569,686	$ 904,458	$ 716,341	$ 1,596,111	$ 1,791,502	$ 972,506	$ 849,663	$ 4,579,646	$ 5,209,782	$ 5,019,822
Operating profit	10,547	313,336	87,588	(80,419)	271,088	360,944	99,984	78,343	331,052	810,359	788,048
Earnings (loss) before income taxes	(5,128)	295,794	68,124	(88,388)	278,586	349,841	86,886	70,837	270,402	786,150
Net earnings									220,434	396,607	533,151
Net earnings attributable to Hasbro, Inc.	$ 8,766	$ 263,861	$ 60,299	$ (112,492)	$ (5,298)	$ 265,583	$ 67,723	$ 68,599	$ 220,434	$ 396,607	$ 551,380
Net earnings (loss) [Abstract]
Basic (in dollars per share)	$ 0.07	$ 2.08	$ 0.48	$ (0.9)	$ (0.04)	$ 2.12	$ 0.54	$ 0.55	$ 1.75	$ 3.17	$ 4.4
Diluted (in dollars per share)	0.07	2.06	0.48	(0.9)	(0.04)	2.09	0.53	0.54	1.74	3.12	4.34
Market price [Abstract]
High (in dollars per share)	107.57	109.6	93	103.39	99.17	116.2	113.49	101.08	109.6	116.2
Low (in dollars per share)	76.84	91.7	79	83.56	87.92	91.57	94.76	77.2	76.84	77.2
Cash dividends declared (in dollars per share)	$ 0.63	$ 0.63	$ 0.63	$ 0.63	$ 0.57	$ 0.57	$ 0.57	$ 0.57	$ 2.52	$ 2.28	$ 2.04