Financial Instruments - Production Financing Loans (Details) - USD ($) $ in Millions	Jun. 26, 2022	Dec. 26, 2021	Jun. 27, 2021
Debt Disclosure [Abstract]
Production financing facilities	$ 175.0	$ 170.1	$ 212.6
Non-current	0.0	0.0	53.0
Current	$ 175.0	$ 170.1	$ 159.6