Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Income Statement [Abstract]
Net revenues	$ 1,322.2	$ 860.3	$ 2,437.0	$ 1,965.9
Costs and expenses:
Cost of sales	345.0	253.2	634.9	515.9
Program cost amortization	110.7	50.6	208.2	182.8
Royalties	111.5	97.4	220.4	210.2
Product development	87.2	58.4	149.0	112.2
Advertising	105.4	72.3	193.3	174.0
Amortization of intangibles	29.7	34.7	62.6	71.5
Loss on assets held for sale	101.8	0.0	101.8	0.0
Selling, distribution and administration	354.3	281.2	642.9	560.3
Acquisition and related costs	0.0	10.3	0.0	160.1
Total costs and expenses	1,245.6	858.1	2,213.1	1,987.0
Operating profit (loss)	76.6	2.2	223.9	(21.1)
Non-operating expense (income):
Interest expense	46.1	49.6	94.0	104.3
Interest income	(1.2)	(0.9)	(2.4)	(5.6)
Other income, net	(9.4)	(2.8)	(38.3)	(4.1)
Total non-operating expense, net	35.5	45.9	53.3	94.6
Earnings (loss) before income taxes	41.1	(43.7)	170.6	(115.7)
Income tax expense (benefit)	63.0	(10.8)	75.0	(14.9)
Net earnings (loss)	(21.9)	(32.9)	95.6	(100.8)
Net earnings attributable to noncontrolling interests	1.0	1.0	2.3	2.8
Net earnings (loss) attributable to Hasbro, Inc.	$ (22.9)	$ (33.9)	$ 93.3	$ (103.6)
Net earnings (loss) per common share:
Basic (in dollars per share)	$ (0.17)	$ (0.25)	$ 0.68	$ (0.75)
Diluted (in dollars per share)	(0.17)	(0.25)	0.68	(0.75)
Cash dividends declared per common share (in dollars per share)	$ 0.68	$ 0.68	$ 1.36	$ 1.36