Goodwill - Schedule of Goodwill (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020
Goodwill [Roll Forward]
Beginning balance	$ 3,691.7
Goodwill allocation	0.0
Foreign exchange translation	0.1
Impairment during the period	(101.8)	$ 0.0
Reclass to assets held-for-sale	(169.2)
Ending balance	3,420.8	$ 3,666.0
Consumer Products
Goodwill [Roll Forward]
Beginning balance	1,385.7
Goodwill allocation	199.4
Foreign exchange translation	0.0
Impairment during the period	0.0
Reclass to assets held-for-sale	0.0
Ending balance	1,585.1
Wizards of the Coast & Digital Gaming
Goodwill [Roll Forward]
Beginning balance	53.1
Goodwill allocation	254.2
Foreign exchange translation	0.4
Impairment during the period	0.0
Reclass to assets held-for-sale	0.0
Ending balance	307.7
Entertainment
Goodwill [Roll Forward]
Beginning balance	2,252.9
Goodwill allocation	(453.6)
Foreign exchange translation	(0.3)
Impairment during the period	(101.8)
Reclass to assets held-for-sale	(169.2)
Ending balance	$ 1,528.0