Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2016	Sep. 27, 2015	Sep. 25, 2016	Sep. 27, 2015
Earnings Per Share (Thousands of Dollars and Shares Except Per Share Data) [Abstract]
Net Earnings Attributable to Hasbro, Inc.	$ 257,798	$ 207,599	$ 358,655	$ 276,075
Basic [Abstract]
Average shares outstanding (in shares)	125,500	125,100	125,414	125,016
Equivalent shares (basic) (in shares)	125,500	125,100	125,414	125,016
Net earnings attributable to Hasbro, Inc. per common share-basic (in dollars per share)	$ 2.05	$ 1.66	$ 2.86	$ 2.21
Diluted [Abstract]
Average shares outstanding (in shares)	125,500	125,100	125,414	125,016
Effect of dilutive securities:
Options and other share-based awards (in shares)	1,678	1,817	1,642	1,673
Equivalent shares (diluted) (in shares)	127,178	126,917	127,056	126,689
Net earnings attributable to Hasbro, Inc. per common share-diluted (in dollars per share)	$ 2.03	$ 1.64	$ 2.82	$ 2.18
Employee Stock Option and Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options to acquire shares totaling excluded as antidilutive	492	0	492	261