Segment Reporting, Revenue by Brand Portfolio (Details) - USD ($) $ 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
Revenue from External Customer [Line Items]
Net revenues	$ 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
Franchise Brands [Member]
Revenue from External Customer [Line Items]
Net revenues									2,327,668	2,285,414	2,345,128
Partner Brands [Member]
Revenue from External Customer [Line Items]
Net revenues									1,412,770	1,101,305	654,057
Hasbro Gaming [Member]
Revenue from External Customer [Line Items]
Net revenues									813,433	662,319	643,615
Emerging Brands [Member]
Revenue from External Customer [Line Items]
Net revenues									$ 465,951	$ 398,471	$ 634,407