Consolidated Statements of Shareholder's Equity - USD ($) $ in Thousands	Total	Common stock [Member]	Additional paid-in capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Earnings [Member]	Treasury stock [Member]	Total Shareholders' Equity Attributable to Hasbro, Inc. [Member]
Cumulative effect of new accounting principle in period of adoption | Impact of adoption of ASU 2018-02 [Member]	$ 0	$ 0	$ 0	$ 21,503	$ (21,503)	$ 0	$ 0
Balance at Dec. 31, 2017		104,847	1,050,605	4,260,222	(239,425)	(3,346,292)	1,829,957
Net earnings (loss)	(112,492)	0	0	(112,492)	0	0	(112,492)
Other comprehensive earnings (loss), net of tax, total	(31,467)	0	0	0	(31,467)	0	(31,467)
Stock-based compensation activity	(7,543)	0	(7,528)	0	0	(15)	(7,543)
Purchases of common stock	(38,791)	0	0	0	0	(38,791)	(38,791)
Stock-based compensation expense		0	10,291	0	0	0	10,291
Dividends declared		0	0	(78,596)	0	0	(78,596)
Balance at Apr. 01, 2018	1,571,359	104,847	1,053,368	4,090,637	(292,395)	(3,385,098)	1,571,359
Balance at Dec. 30, 2018	1,754,486	104,847	1,275,059	4,184,374	(294,514)	(3,515,280)	1,754,486
Net earnings (loss)	26,727	0	0	26,727	0	0	26,727
Other comprehensive earnings (loss), net of tax, total	12,175	0	0	0	12,175	0	12,175
Stock-based compensation activity	(9,545)	0	(11,114)	0	0	1,569	(9,545)
Purchases of common stock	(49,182)	0	0	0	0	(49,182)	(49,182)
Stock-based compensation expense	5,285	0	5,285	0	0	0	5,285
Dividends declared	(85,415)	0	0	(85,415)	0	0	(85,415)
Balance at Mar. 31, 2019	$ 1,654,531	$ 104,847	$ 1,269,230	$ 4,125,686	$ (282,339)	$ (3,562,893)	$ 1,654,531