Financial Instruments - Production Financing Loans (Details) - USD ($) $ in Millions	Jun. 27, 2021	Dec. 27, 2020	Jun. 28, 2020
Debt Disclosure [Abstract]
Production financing held by production subsidiaries	$ 212.6	$ 165.5	$ 142.0
Other loans	0.0	5.4	6.4
Total	212.6	170.9	148.4
Non-current	53.0	62.9	93.4
Current	159.6	102.6	48.6
Total	$ 212.6	$ 165.5	$ 142.0

Amount of long-term loans classified as other, payable within one year or the operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_OtherLoansPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant