Short-term loans (Narrative) (Details) - Loans Payable - USD ($) $ in Millions |
12 Months Ended | |
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Dec. 31, 2025 |
Dec. 31, 2024 |
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| Short-term loans | ||
| Aggregate principle amount | $ 11 | $ 10 |
| Maximum borrowing facility | $ 12 | $ 37 |
| Debt instrument, maturity date, description | These loans were all with a maturity of less than one year | These loans were all with a maturity of less than one year |
| Interest rate (as a percent) | 1.13% | |
| Minimum | ||
| Short-term loans | ||
| Interest rate (as a percent) | 0.93% | |
| Maximum | ||
| Short-term loans | ||
| Interest rate (as a percent) | 1.20% | |
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- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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