Segment Reporting - Net Revenues by Category (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 26, 2021	Dec. 27, 2020	Dec. 29, 2019
Revenue from External Customer [Line Items]
Net revenues	$ 6,420.4	$ 5,465.4	$ 4,720.2
Entertainment
Revenue from External Customer [Line Items]
Net revenues	1,152.2	909.1	77.8
Entertainment | Film and TV
Revenue from External Customer [Line Items]
Net revenues	932.5	700.5	45.1
Entertainment | Family Brands
Revenue from External Customer [Line Items]
Net revenues	132.9	86.5	31.8
Entertainment | Music and Other
Revenue from External Customer [Line Items]
Net revenues	$ 86.8	$ 122.1	$ 0.9