Business Combination - Narrative (Details) £ / shares in Units, $ / shares in Units, £ in Thousands, shares in Thousands			3 Months Ended		12 Months Ended
	Dec. 30, 2019 USD ($) shares	Dec. 30, 2019 GBP (£) £ / shares shares	Mar. 29, 2020 USD ($)	Mar. 31, 2019 USD ($)	Dec. 30, 2018 USD ($)	Dec. 30, 2019 USD ($) $ / shares	Dec. 29, 2019 USD ($)	Nov. 30, 2019 USD ($)
Business Acquisition [Line Items]
Shares issued as consideration (in shares) | shares	10,592	10,592
Goodwill			$ 3,572,650,000	$ 485,528,000			$ 494,584,000
Acquisition and related costs			149,782,000	0
Asset impairments			40,878,000	$ 0
Amortization of intangibles					$ 12,480,000
Interest expense					19,105,000
Income tax effect, amount					$ 6,570,000
eOne
Business Acquisition [Line Items]
Payments to acquire businesses	$ 4,635,041,000	£ 2,900,000
Cash consideration per share (in dollars and GBP per share) | (per share)		£ 5.60				$ 7.35
Conversion rate (USD/GBP) | $ / shares						$ 1.31
Cash consideration for shares outstanding	3,658,345,000
Indebtedness redeemed as consideration for acquisition	831,130,000
Goodwill						$ 3,079,181,000
Acquisition and related costs			149,782,000
Business acquisition, pro forma, acquisition related costs			77,729,000
Integration related costs			95,718,000
Integration related costs, acceleration of stock-based compensation			47,339,000
Integration related costs, advisor fees			38,168,000
Less: Employee awards to be recorded as future stock compensation expense	47,399,000
Restructuring and related cost			54,064,000
Severance expense			13,186,000
Asset impairments			$ 40,878,000
Unsecured Committed | eOne
Business Acquisition [Line Items]
Cash consideration per share (in dollars and GBP per share) | $ / shares						$ 95.00
Term loans proceeds which financed acquisition						$ 1,000,000,000
Senior Notes | Senior Unsecured Notes
Business Acquisition [Line Items]
Proceeds from Issuance of Debt	$ 975,185
Aggregate principal amount						$ 2,375,000,000		$ 2,375,000,000
Minimum
Business Acquisition [Line Items]
Income tax rate, percent			21.00%
Minimum | Trademarks and Trade Names | eOne
Business Acquisition [Line Items]
Intangible asset useful life			7 years
Maximum
Business Acquisition [Line Items]
Income tax rate, percent					22.50%
Maximum | Trademarks and Trade Names | eOne
Business Acquisition [Line Items]
Intangible asset useful life			15 years
Maximum | Films and Television Programs | eOne
Business Acquisition [Line Items]
Intangible asset useful life			10 years