Segment Reporting - Net Revenues by Product Category (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Revenue from External Customer [Line Items]
Net revenues	$ 984,537	$ 904,458	$ 1,717,047	$ 1,620,799
Franchise Brands
Revenue from External Customer [Line Items]
Net revenues	576,715	506,535	970,289	868,241
Partner Brands
Revenue from External Customer [Line Items]
Net revenues	213,448	208,005	385,437	408,597
Hasbro Gaming
Revenue from External Customer [Line Items]
Net revenues	123,420	134,275	230,985	239,502
Emerging Brands
Revenue from External Customer [Line Items]
Net revenues	$ 70,954	$ 55,643	$ 130,336	$ 104,459