Investments in Productions and Investments in Acquired Content Rights - Program Production Costs (Details) - USD ($) $ in Millions	Sep. 26, 2021	Dec. 27, 2020	Sep. 27, 2020
Film and TV Programming
Released, net of amortization	$ 512.6	$ 428.0	$ 477.3
Completed and not released	20.1	17.3	18.1
In production	202.1	185.5	51.0
Pre-production	91.9	67.6	41.1
Total film costs	826.7	698.4	587.5
Other Programming
Released, net of amortization	3.9	13.7	11.5
Completed and not released	0.4	2.1	3.4
In production	5.9	5.4	9.1
Pre-production	2.5	7.6	8.0
Other programming costs	12.7	28.8	32.0
Total Program Investments	$ 839.4	$ 727.2	$ 619.5