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Stockholders' equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Billions | 3 Months Ended
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Mar. 31, 2025 | Dec. 31, 2024 | Mar. 31, 2024
Equity [Abstract] |  |  |
Amount available for stock repurchases under a board approved stock repurchase plan | $ 6.8 |  |
Dividends declared per share (in usd per share) | $ 2.38 | $ 2.38 | $ 2.25

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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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Balance Type: | na
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- References No definition available. + Details
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- Definition Amount remaining authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. + References No definition available. + Details
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