Segment Reporting - Net Revenues by Product Category (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018
Revenue from External Customer [Line Items]
Net revenues	$ 1,575,173	$ 1,569,686	$ 3,292,220	$ 3,190,485
Franchise Brands
Revenue from External Customer [Line Items]
Net revenues	779,659	847,745	1,749,948	1,715,986
Partner Brands
Revenue from External Customer [Line Items]
Net revenues	427,029	305,827	812,466	714,424
Hasbro Gaming
Revenue from External Customer [Line Items]
Net revenues	232,287	280,832	463,272	520,334
Emerging Brands
Revenue from External Customer [Line Items]
Net revenues	$ 136,198	$ 135,282	$ 266,534	$ 239,741