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Fair value measurements - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Jan. 01, 2023
Derivative [Line Items] |  |
Deferred net losses (gains) on derivatives included in accumulated other comprehensive income | $ (377) |
Description of reclassification of cash flow hedge gain (loss) | next 12 months |
Maximum length of time for hedging transaction exposure | 18 months |
Foreign exchange contracts |  |
Derivative [Line Items] |  |
Collateral paid | $ 4,000 | $ 800
Derivative, notional amount | 42,900 | 41,500
Cross currency interest rate swaps |  |
Derivative [Line Items] |  |
Derivative, notional amount | 39,700 | 36,200
Interest Rate Swap |  |
Derivative [Line Items] |  |
Derivative, notional amount | 10,000 | 10,000
Equity securities | Equity Investments without readily determinable value |  |
Derivative [Line Items] |  |
Equity, fair value adjustment, impairment loss | (1) | (51)
Equity, fair value adjustment, change in observable prices | $ 27 | $ 142

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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 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480237/815-40-50-5 + Details
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