Investments in Productions and Investments in Acquired Content Rights - Program Production Costs (Details) - USD ($) $ in Millions	Mar. 28, 2021	Dec. 27, 2020	Mar. 29, 2020
Film and TV Programming
Released, net of amortization	$ 481.9	$ 428.0	$ 402.5
Completed and not released	35.0	17.3	138.0
In production	147.4	185.5	89.9
Pre-production	72.8	67.6	80.1
Total film costs	737.1	698.4	710.5
Other Programming
Released, net of amortization	14.8	13.7	10.1
Completed and not released	2.8	2.1	0.0
In production	4.2	5.4	2.2
Pre-production	8.7	7.6	0.0
Other programming costs	30.5	28.8	12.3
Total Program Investments	$ 767.6	$ 727.2	$ 722.8