Earnings (Loss) Per Share - Schedule of Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net earnings (loss) attributable to Hasbro, Inc.	$ (69,637)	$ 26,727
Average shares outstanding (in shares)	137,147	126,287
Basic
Equivalent Shares (in shares)	137,147	126,287
Net earnings per common share (in dollars per share)	$ (0.51)	$ 0.21
Effect of dilutive securities:
Options and other share-based awards (in shares)	0	529
Equivalent Shares (in shares)	137,147	126,816
Net earnings per common share (in dollars per share)	$ (0.51)	$ 0.21