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Shareholders' equity - Additional information (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 09, 2025 | Feb. 28, 2025 | Jun. 29, 2025 | Jun. 30, 2024 | Jun. 29, 2025 | Jun. 30, 2024 | Jul. 30, 2024
Equity [Abstract] |  |  |  |  |  |  |
Weighted average antidilutive shares which were not included in the calculation of earnings per share |  |  | 1,500,000 | 900,000 | 1,300,000 | 900,000 |
Share repurchase program, authorized amount |  | $ 300 |  |  |  |  | $ 500
Share repurchase program, authorized (in shares) | 493,150 | 1,725,253 |  |  |  |  |
Percent purchased of authorized amount |  | 80.00% |  |  |  |  |
Cost per share (in USD per share) | $ 135.23 | $ 139.11 |  |  |  |  |

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- Definition Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 + Details
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- Definition Number of shares authorized to be purchased under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 + Details
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- Definition Share Repurchase Program, Percent Purchased Of Authorized Amount. + References No definition available. + Details
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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481549/505-30-45-1 + Details
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