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Employee Benefit Plans - Weighted-average assumptions used to determine net periodic benefit cost (Details) | 12 Months Ended
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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%

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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. + References 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)(1) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition 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. + References 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 + Details
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- References No definition available. + Details
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