Revenue Recognition - Narrative (Details) $ in Thousands	6 Months Ended
	Jun. 28, 2020 USD ($) brand_category	Dec. 30, 2019 USD ($)	Dec. 29, 2019 USD ($)	Jun. 30, 2019 USD ($)
Disaggregation of Revenue [Line Items]
Contract assets	$ 361,408			$ 41,414
Prepaid expenses and other current assets	252,870			32,199
Contract assets - long term	108,538			9,215
Contract liabilities - current	141,650			53,804
Other liabilities	$ 771,692		$ 556,559	$ 554,212
Number of brand categories | brand_category	5
eOne
Disaggregation of Revenue [Line Items]
Contract assets		$ 283,327
Prepaid expenses and other current assets		226,432
Contract assets - long term		56,895
Deferred revenue	$ 152,266
Contract liabilities - current		$ 144,094
Other liabilities	$ 8,172
Contract asset, balance, percentage	77.00%
Contract liability, balance, percentage	57.00%