Investments in Productions and Investments in Acquired Content Rights - Program Costs Amortization (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 28, 2021	Mar. 29, 2020
Product Information [Line Items]
Program cost amortization	$ 97.5	$ 132.2
eOne
Product Information [Line Items]
Program cost amortization	97.5
eOne \| Production Investment
Product Information [Line Items]
Program cost amortization	84.5
eOne \| Content Investment
Product Information [Line Items]
Program cost amortization	$ 13.0

The amount of expense recognized in the current period related to program production costs which are capitalized by the Company as they are incurred and amortized using the individual-film-forecast method, whereby these costs are amortized in the proportion that the current period's revenues bear to management's estimate of total ultimate revenues as of the beginning of such period related to the program.

No definition available.

Name:	has_ProgramProductionCostAmortization
Namespace Prefix:	has_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration