Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended
	Mar. 28, 2021	Mar. 29, 2020
Income Statement [Abstract]
Net revenues	$ 1,114.8	$ 1,105.6
Costs and expenses:
Cost of sales	289.9	262.7
Program cost amortization	97.5	132.2
Royalties	108.9	112.8
Product development	61.8	53.8
Advertising	87.9	101.7
Amortization of intangibles	32.9	36.8
Selling, distribution and administration	288.6	279.1
Acquisition and related costs	0.0	149.8
Total costs and expenses	967.5	1,128.9
Operating profit (loss)	147.3	(23.3)
Non-operating expense (income):
Interest expense	47.9	54.7
Interest income	(1.2)	(4.7)
Other income, net	(28.9)	(1.3)
Total non-operating expense, net	17.8	48.7
Earnings (loss) before income taxes	129.5	(72.0)
Income tax expense (benefit)	12.0	(4.1)
Net earnings (loss)	117.5	(67.9)
Net earnings attributable to noncontrolling interests	1.3	1.8
Net earnings (loss) attributable to Hasbro, Inc.	$ 116.2	$ (69.7)
Net earnings (loss) per common share:
Basic (in dollars per share)	$ 0.84	$ (0.51)
Diluted (in dollars per share)	0.84	(0.51)
Cash dividends declared per common share (in dollars per share)	$ 0.68	$ 0.68