Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Jul. 02, 2017	Jun. 26, 2016	Jul. 02, 2017	Jun. 26, 2016
Earnings Per Share (Thousands of Dollars and Shares Except Per Share Data) [Abstract]
Net Earnings Attributable to Hasbro, Inc.	$ 67,723	$ 52,106	$ 136,322	$ 100,857
Basic [Abstract]
Average shares outstanding (in shares)	125,263	125,475	125,221	125,371
Equivalent shares (basic) (in shares)	125,263	125,475	125,221	125,371
Net earnings attributable to Hasbro, Inc. per common share-basic (in dollars per share)	$ 0.54	$ 0.42	$ 1.09	$ 0.8
Diluted [Abstract]
Average shares outstanding (in shares)	125,263	125,475	125,221	125,371
Effect of dilutive securities:
Options and other share-based awards (in shares)	2,104	1,566	2,075	1,624
Equivalent shares (diluted) (in shares)	127,367	127,041	127,296	126,995
Net earnings attributable to Hasbro, Inc. per common share-diluted (in dollars per share)	$ 0.53	$ 0.41	$ 1.07	$ 0.79
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	453	492	546	492

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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