Business Combination - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions		1 Months Ended	12 Months Ended
	Dec. 30, 2019	Nov. 30, 2019	Dec. 26, 2021	Dec. 27, 2020	Dec. 29, 2019	Sep. 30, 2019
Business Acquisition [Line Items]
Goodwill			$ 3,419,600,000	$ 3,691,700,000	$ 494,600,000
Acquisition and related costs			0	218,600,000	0
Asset impairments			0	71,500,000	0
Payment for debt prepayment cost			9,100,000	0	0
Entertainment
Business Acquisition [Line Items]
Goodwill			$ 1,527,400,000	2,252,900,000	11,800,000
Minimum
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life			2 years
Maximum
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life			25 years
Unsecured Debt | $1.0 Billion Term Loan Agreement
Business Acquisition [Line Items]
Debt instrument, face amount						$ 1,000,000,000
eOne Acquisition
Business Acquisition [Line Items]
Total purchase price to be allocated	$ 4,600,000,000
Cash consideration for employee share based payment awards outstanding	3,800,000,000
Aggregate purchase price, liabilities assumed	800,000,000
Shares issued in business combination (in shares)		10.6
Business combination, share price (in USD per share)		$ 95.00
Shares issued in business combination value		$ 975,200,000
Amortization of intangibles			$ 85,000,000	97,900,000	38,800,000
Investments in productions and content	564,800,000
Goodwill	$ 3,200,000,000			3,200,000,000
Acquisition and related costs				218,600,000
Integration related costs				145,200,000
Restructuring and related cost				73,400,000
Asset impairments				40,900,000
Acquisition costs					24,300,000
Interest expense					75,400,000
Other expenses					74,800,000
Payment for debt prepayment cost					19,800,000
Income tax effect of pro forma adjustments, amount					$ 12,300,000
Blended statutory Income tax rate, percent					22.50%
eOne Acquisition | Foreign exchange forward
Business Acquisition [Line Items]
Other expenses					$ 94,600,000
eOne Acquisition | Entertainment
Business Acquisition [Line Items]
Acquisition and related costs				$ 133,200,000
eOne Acquisition | Titles
Business Acquisition [Line Items]
Threshold years for amortization method	3 years
eOne Acquisition | Minimum | Trademarks and Trade Names
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	7 years
eOne Acquisition | Maximum | Trademarks and Trade Names
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	15 years
eOne Acquisition | Maximum | Titles Over 3 Years Old
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life	10 years
eOne Acquisition | Senior Notes
Business Acquisition [Line Items]
Debt instrument, face amount		$ 2,400,000,000
eOne Acquisition | Unsecured Debt | $1.0 Billion Term Loan Agreement
Business Acquisition [Line Items]
Debt instrument, face amount	$ 1,000,000,000