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Defined Benefit Plans - Assumed Health Care Cost Trend Rates Used to Determine Benefit Obligations and Net Cost (Detail) - Postretirement Benefits [Member] | 12 Months Ended
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Dec. 28, 2024 | Dec. 30, 2023
Defined Benefit Plan Disclosure [Line Items] |  |  |
Rate that the cost trend rate is assumed to decline (the ultimate trend rate) |  | 4.50% | 4.50%
Year that the rate reaches the ultimate trend rate |  | 2035 | 2033
Rate that the cost trend rate is assumed to decline (the ultimate trend rate) |  | 4.50% | 4.50%
Year that the rate reaches the ultimate trend rate |  | 2033 | 2028
Pre Age Sixty Five |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Health care cost trend rate assumed for next year | [1] | 7.10% | 7.30%
Health care cost trend rate assumed for next year | [1] | 7.30% | 5.80%
Post Age Sixty Five |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Health care cost trend rate assumed for next year | [1] | 7.50% | 6.90%
Health care cost trend rate assumed for next year | [1] | 6.90% | 6.30%
[1] | The pre-65 initial health care cost trend rate is shown first / followed by the post-65 rate

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- Definition Defined net benefit plan health care cost trend rate assumed next fiscal year. + References No definition available. + Details
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- Definition Defined net benefit plan ultimate health care cost trend rate 1 + References No definition available. + Details
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- Definition Defined Net Benefit Plan Year Health Care Cost Trend Rate Reaches Ultimate Trend Rates + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (l) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Ultimate trend rate for health care cost for defined benefit postretirement plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (l) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Year ultimate health care cost trend rate is expected to be reached, in YYYY format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (l) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Details
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- Details
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- Details
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