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Fair value measurements - Narrative (Details) - USD ($) $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
May 17, 2024 | May 15, 2024 | Dec. 29, 2024 | Dec. 31, 2023
Derivative [Line Items] |  |  |  |
Deferred net losses (gains) on derivatives included in accumulated other comprehensive income |  |  | $ 1,700 |
Description of reclassification of cash flow hedge gain (loss) |  |  | next 12 months |
Maximum length of time for hedging transaction exposure |  |  | 18 months |
Commercial paper |  | $ 3,600 |  |
Proceeds from issuance of commercial paper |  | $ 3,600 |  |
Debt for equity exchange, shares exchanged (in shares) | 182,329,550 |  |  |
Loss on shares exchanged | $ 400 |  |  |
Foreign exchange contracts |  |  |  |
Derivative [Line Items] |  |  |  |
Collateral paid |  |  | $ 2,200 | $ 4,000
Derivative, notional amount |  |  | 45,100 | 42,900
Cross currency interest rate swaps |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, notional amount |  |  | 40,500 | 39,700
Interest Rate Swap |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, notional amount |  |  | 9,000 | 10,000
Equity securities | Equity Investments without readily determinable value |  |  |  |
Derivative [Line Items] |  |  |  |
Equity, fair value adjustment, impairment loss |  |  | (171) | (1)
Equity, fair value adjustment, change in observable prices |  |  | $ (26) | $ 27

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- Definition Amount, after tax, of accumulated gain (loss) on derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-11 + Details
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- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4H + Details
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- Definition Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(a)(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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