Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 25, 2016	Sep. 25, 2016	Jun. 26, 2016	Mar. 27, 2016	Dec. 27, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 25, 2016	Dec. 27, 2015	Dec. 28, 2014
Quarterly Financial Data (Unaudited) [Abstract]
Net revenues, external	$ 1,629,940	$ 1,679,757	$ 878,945	$ 831,180	$ 1,465,354	$ 1,470,997	$ 797,658	$ 713,500	$ 5,019,822	$ 4,447,509	$ 4,277,207
Operating profit	255,157	362,101	84,874	85,916	258,701	303,527	75,500	54,205	788,048	691,933	635,375
Earnings (loss) before income taxes	219,932	346,324	67,020	59,213	231,337	284,617	53,646	34,315	692,489	603,915
Net earnings	180,599	256,162	49,419	46,971	174,394	206,375	40,282	25,821	533,151	446,872	413,310
Net earnings attributable to Hasbro, Inc.	$ 192,725	$ 257,798	$ 52,106	$ 48,751	$ 175,763	$ 207,599	$ 41,809	$ 26,667	$ 551,380	$ 451,838	$ 415,930
Net earnings (loss) [Abstract]
Basic (in dollars per share)	$ 1.54	$ 2.05	$ 0.42	$ 0.39	$ 1.41	$ 1.66	$ 0.33	$ 0.21	$ 4.4	$ 3.61	$ 3.24
Diluted (in dollars per share)	1.52	2.03	0.41	0.38	1.39	1.64	0.33	0.21	4.34	3.57	3.2
Market price [Abstract]
High (in dollars per share)	86.25	87.94	87.63	78.94	79.93	84.42	78.91	63.47	87.94	84.42
Low (in dollars per share)	77.27	76.16	77.8	66.96	64.91	60.38	61.13	51.42	66.96	51.42
Cash dividends declared (in dollars per share)	$ 0.51	$ 0.51	$ 0.51	$ 0.51	$ 0.46	$ 0.46	$ 0.46	$ 0.46	$ 2.04	$ 1.84	$ 1.72