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Capital and treasury stock - Narrative (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Billions |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 02, 2024 | Dec. 31, 2023 | Jan. 01, 2023 | Jan. 02, 2022 | Sep. 14, 2022
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Common stock, shares issued (in shares) |  | 3,119,843 | 3,119,843 | 3,119,843 |
Cash dividends paid (in dollars per share) |  | $ 4.70 | $ 4.45 | $ 4.19 |
Subsequent Event |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Cash dividend (in dollars per share) | $ 1.19 |  |  |  |
December 17, 2018 Share Repurchase Program |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  | $ 5.0

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1 + Details
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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1 + Details
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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: 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(29)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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