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Pensions and other benefit plans (Tables) | 9 Months Ended
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Sep. 28, 2025
Retirement Benefits [Abstract] |
Components of Net Periodic Benefit Cost | Components of net periodic benefit cost Net periodic benefit costs for the Company’s defined benefit retirement plans and other benefit plans include the following components:
|  | Fiscal Third Quarter Ended |  | Fiscal Nine Months Ended
|  | Retirement Plans |  | Other Benefit Plans |  | Retirement Plans |  | Other Benefit Plans
(Dollars in Millions) |  | September 28, 2025 |  | September 29, 2024 |  | September 28, 2025 |  | September 29, 2024 |  | September 28, 2025 |  | September 29, 2024 |  | September 28, 2025 |  | September 29, 2024
Service cost |  | $223 |  | 225 |  | 72 |  | 69 |  | 656 |  | 671 |  | 216 |  | 207
Interest cost |  | 358 |  | 351 |  | 54 |  | 53 |  | 1,065 |  | 1,054 |  | 161 |  | 157
Expected return on plan assets |  | (604) |  | (643) |  | (2) |  | (2) |  | (1,790) |  | (1,924) |  | (5) |  | (5)
Amortization of prior service cost/(credit) |  | (46) |  | (46) |  | — |  | — |  | (138) |  | (138) |  | (1) |  | (1)
Recognized actuarial (gains)/losses |  | 86 |  | 43 |  | 16 |  | 13 |  | 254 |  | 130 |  | 47 |  | 39
Curtailments and settlements |  | — |  | 6 |  | — |  | — |  | 1 |  | (2) |  | — |  | —
Net periodic benefit cost/(credit) |  | $17 |  | (64) |  | 140 |  | 133 |  | 48 |  | (209) |  | 418 |  | 397

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (q) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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