Discount rate, income approach, goodwill impairment analysis, Backflip

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Terminal value growth rate used to estimate cash flows beyond the forecast period, income approach, good will impairment analysis

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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Goodwill and Intangibles - Narrative (Details) - USD ($)	3 Months Ended			12 Months Ended
	Dec. 27, 2020	Mar. 29, 2020	Dec. 30, 2018	Dec. 27, 2020	Dec. 29, 2019	Dec. 30, 2018	Dec. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 3,691,709,000		$ 485,881,000	$ 3,691,709,000	$ 494,584,000	$ 485,881,000
Goodwill acquired				$ 3,079,534,000	9,117,000
Terminal value growth rate, income approach, backflip	3.00%			3.00%
Discount rate, income approach, goodwill impairment analysis, backflip	19.00%			19.00%
Impairment of goodwill	$ 30,662,000	$ 20,047,000	86,253,000	$ 0	0	86,253,000
Asset Impairments			31,303,000	71,540,000	0	31,303,000
Entertainment, Licensing and Digital
Finite-Lived Intangible Assets [Line Items]
Goodwill	137,183,000		18,542,000	137,183,000	32,789,000	$ 18,542,000
Goodwill acquired				0	9,117,000
Impairment of goodwill			$ 86,253,000		$ 0
Tuque Games
Finite-Lived Intangible Assets [Line Items]
Goodwill acquired				9,117,000
eOne Acquisition
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 3,195,749,000			$ 3,195,749,000			$ 3,195,396,000
eOne Acquisition \| Entertainment, Licensing and Digital
Finite-Lived Intangible Assets [Line Items]
Goodwill							$ 103,171,000