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Other Comprehensive Income (Loss) - Narratives (Details) $ in Thousands, £ in Millions |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 06, 2020 USD ($) | Jan. 01, 2022 USD ($) | Jan. 01, 2022 GBP (£) | Jan. 01, 2022 USD ($) | Dec. 26, 2020 USD ($) | Dec. 28, 2019 USD ($)
Other Comprehensive Income (Loss) |  |  |  |  |  |
Benefit obligation, unamortized actuarial loss | $ 13,400 |  |  |  |  |
One-time non cash settlement charge |  |  |  | $ (19,855) | $ (236) | $ (260)
Prior service cost |  |  |  | $ 179 |  |
Foreign Plan |  |  |  |  |  |
Other Comprehensive Income (Loss) |  |  |  |  |  |
One-time non cash settlement charge |  | $ 19,900 | £ 14.9 |  |  |
Prior service cost |  | $ 500 | £ 0.4 |  |  |

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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive 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 (a)(4) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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