Employee Benefit Plans - Weighted-average assumptions used to determine net periodic benefit cost (Details)	12 Months Ended
Dec. 30, 2021	Dec. 31, 2020	Dec. 26, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Discount rate	2.45%	3.10%	4.15%
Rate of compensation increase	4.00%	4.00%	4.00%

Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(2)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration