Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
Apr. 02, 2017	Mar. 27, 2016
Earnings Per Share (Thousands of Dollars and Shares Except Per Share Data) [Abstract]
Net Earnings Attributable to Hasbro, Inc.	$ 68,599	$ 48,751
Basic [Abstract]
Average shares outstanding (in shares)	125,182	125,266
Equivalent shares (basic) (in shares)	125,182	125,266
Net earnings attributable to Hasbro, Inc. per common share-basic (in dollars per share)	$ 0.55	$ 0.39
Diluted [Abstract]
Average shares outstanding (in shares)	125,182	125,266
Effect of dilutive securities:
Options and other share-based awards (in shares)	2,047	1,682
Equivalent shares (diluted) (in shares)	127,229	126,948
Net earnings attributable to Hasbro, Inc. per common share-diluted (in dollars per share)	$ 0.54	$ 0.38
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	638	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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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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