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Defined Benefit Plans - Schedule of Assumptions Used (Detail) | 12 Months Ended
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Dec. 28, 2024 | Dec. 30, 2023 | Dec. 31, 2022
Pension Benefits [Member] |  |  |
Weighted-Average Assumption Used to Determine Benefit Obligations at December 31: |  |  |
Discount rate | 5.70% | 5.00% | 5.20%
Weighted-Average Assumptions Used to Determine Net Cost for Years Ended December 31: |  |  |
Discount rate | 5.00% | 5.20% | 2.90%
Expected long-term rate of return on plan assets | 7.30% | 6.10% | 4.40%
Postretirement Benefits [Member] |  |  |
Weighted-Average Assumption Used to Determine Benefit Obligations at December 31: |  |  |
Discount rate | 7.10% | 6.00% | 5.80%
Weighted-Average Assumptions Used to Determine Net Cost for Years Ended December 31: |  |  |
Discount rate | 6.00% | 5.80% | 3.90%

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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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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 -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-8 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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