Earnings (Loss) Per Share - Schedule of Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net earnings (loss) attributable to Hasbro, Inc.	$ (33,915)	$ 13,433	$ (103,552)	$ 40,160
Average shares outstanding (in shares)	137,238	126,329	137,193	126,308
Basic
Equivalent Shares (in shares)	137,238	126,329	137,193	126,308
Net earnings per common share (in dollars per share)	$ (0.25)	$ 0.11	$ (0.75)	$ 0.32
Effect of dilutive securities:
Options and other share-based awards (in shares)	0	518	0	523
Equivalent Shares (in shares)	137,238	126,847	137,193	126,831
Net earnings per common share (in dollars per share)	$ (0.25)	$ 0.11	$ (0.75)	$ 0.32