Summary of Significant Accounting Policies (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 25, 2016 USD ($) $ / shares	Sep. 25, 2016 USD ($) $ / shares	Jun. 26, 2016 USD ($) $ / shares	Mar. 27, 2016 USD ($) $ / shares	Dec. 27, 2015 USD ($) $ / shares	Sep. 27, 2015 USD ($) $ / shares	Jun. 28, 2015 USD ($) $ / shares	Mar. 29, 2015 USD ($) $ / shares	Dec. 25, 2016 USD ($) $ / shares shares	Dec. 27, 2015 USD ($) $ / shares shares	Dec. 28, 2014 USD ($) $ / shares shares	Sep. 23, 2014	Oct. 31, 2009
Long-lived assets [Line Items]
Equity method ownership percentage												40.00%	50.00%
Maximum period for an investment to be classified as highly liquid									three months
Shipping and handling expense | $									$ 180,270	$ 159,854	$ 157,326
Options excluded from calculation of diluted earnings per share (in shares)									277	0	674
Earnings per share, basic [Abstract]
Net earnings attributable to Hasbro, Inc. | $	$ 192,725	$ 257,798	$ 52,106	$ 48,751	$ 175,763	$ 207,599	$ 41,809	$ 26,667	$ 551,380	$ 451,838	$ 415,930
Average shares outstanding (in shares)									125,292	125,006	128,411
Net earnings per share, basic (in dollars per share) | $ / shares	$ 1.54	$ 2.05	$ 0.42	$ 0.39	$ 1.41	$ 1.66	$ 0.33	$ 0.21	$ 4.4	$ 3.61	$ 3.24
Earnings per share, diluted [Abstract]
Net earnings attributable to Hasbro, Inc. | $	$ 192,725	$ 257,798	$ 52,106	$ 48,751	$ 175,763	$ 207,599	$ 41,809	$ 26,667	$ 551,380	$ 451,838	$ 415,930
Average shares outstanding (in shares)									125,292	125,006	128,411
Effect of dilutive securities: [Abstract]
Options and other share-based awards (in shares)									1,674	1,682	1,475
Equivalent shares (in shares)										126,688	129,886
Net earnings per share, diluted (in dollars per share) | $ / shares	$ 1.52	$ 2.03	$ 0.41	$ 0.38	$ 1.39	$ 1.64	$ 0.33	$ 0.21	$ 4.34	$ 3.57	$ 3.2
Minimum [Member]
Long-lived assets [Line Items]
Finite-lived intangible assets, useful life									4 years
Maximum [Member]
Long-lived assets [Line Items]
Finite-lived intangible assets, useful life									20 years
Joint Venture [Member]
Long-lived assets [Line Items]
Equity method ownership percentage	40.00%								40.00%
Number of significant equity method investments									1
Joint Venture [Member] | Minimum [Member]
Long-lived assets [Line Items]
Equity method ownership percentage	20.00%								20.00%
Joint Venture [Member] | Maximum [Member]
Long-lived assets [Line Items]
Equity method ownership percentage	50.00%								50.00%
Land and Improvements [Member] | Minimum [Member]
Long-lived assets [Line Items]
Depreciation period									15 years
Land and Improvements [Member] | Maximum [Member]
Long-lived assets [Line Items]
Depreciation period									19 years
Buildings and Improvements [Member] | Minimum [Member]
Long-lived assets [Line Items]
Depreciation period									15 years
Buildings and Improvements [Member] | Maximum [Member]
Long-lived assets [Line Items]
Depreciation period									25 years
Machinery and Equipment [Member] | Minimum [Member]
Long-lived assets [Line Items]
Depreciation period									3 years
Machinery and Equipment [Member] | Maximum [Member]
Long-lived assets [Line Items]
Depreciation period									12 years
Tools, Dies and Molds [Member] | Maximum [Member]
Long-lived assets [Line Items]
Depreciation period									3 years