Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Sep. 25, 2016	Oct. 01, 2017	Sep. 25, 2016
Earnings Per Share (Thousands of Dollars and Shares Except Per Share Data) [Abstract]
Net Earnings Attributable to Hasbro, Inc.	$ 265,583	$ 257,798	$ 401,905	$ 358,655
Basic [Abstract]
Average shares outstanding (in shares)	125,170	125,500	125,204	125,414
Equivalent shares (basic) (in shares)	125,170	125,500	125,204	125,414
Net earnings attributable to Hasbro, Inc. per common share-basic (in dollars per share)	$ 2.12	$ 2.05	$ 3.21	$ 2.86
Diluted [Abstract]
Average shares outstanding (in shares)	125,170	125,500	125,204	125,414
Effect of dilutive securities:
Options and other share-based awards (in shares)	1,980	1,678	2,044	1,642
Equivalent shares (diluted) (in shares)	127,150	127,178	127,248	127,056
Net earnings attributable to Hasbro, Inc. per common share-diluted (in dollars per share)	$ 2.09	$ 2.03	$ 3.16	$ 2.82
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	450	492	514	492