Earnings Per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Earnings Per Share [Abstract]
Net earnings (loss) attributable to Hasbro, Inc.	$ 220,898	$ 212,949	$ 117,346	$ 253,109
Average shares outstanding (in shares)	137,258	126,453	137,214	126,356
Basic
Equivalent Shares (in shares)	137,258	126,453	137,214	126,356
Net earnings per common share (in dollars per share)	$ 1.61	$ 1.68	$ 0.86	$ 2.00
Effect of dilutive securities:
Options and other share-based awards (in shares)	232	751	251	600
Equivalent Shares (in shares)	137,490	127,204	137,465	126,956
Net earnings per common share (in dollars per share)	$ 1.61	$ 1.67	$ 0.85	$ 1.99