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Share capital (Tables) | 9 Months Ended
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Sep. 30, 2025
Equity [Abstract] |
Schedule of Shares Redeemed Under Buyback Program |
| Total number of shares purchased | Average price paid per share | Total number of shares purchased as part of publicly announced program |  | Approximate dollar value of shares that may yet be purchased under the program (in millions)
March 3/12/2025 - 3/19/2025 | 1,360,537 |  | $183.75 |  | 1,360,537 |  |  | $750.0 |
June 6/13/2025 - 6/23/2025 | 1,717,181 |  | $145.59 |  | 1,717,181 |  |  | $500.0 |
August 8/15/2025 - 8/20/2025 | 560,100 |  | $178.20 |  | 560,100 |  |  | $900.2 |
September 9/10/2025 - 9/19/2025 | 866,512 |  | $173.33 |  | 866,512 |  |  | $750.0 |
| 4,504,330 |  | $166.51 |  | 4,504,330 |  |  |
During the year ended December 31, 2024, 2,179,699 ordinary shares were redeemed by the Company under this repurchase program for a total consideration of $500.0 million.
| Total number of shares purchased | Average price paid per share | Total number of shares purchased as part of publicly announced program |  | Approximate dollar value of shares that may yet be purchased under the program (in millions)
September 09/18/2024 - 09/25/2024 | 337,070 |  | $296.67 |  | 337,070 |  |  | $400.0 |
October 10/28/2024 - 10/31/2024 | 409,512 |  | $228.57 |  | 409,512 |  |  | $556.4 |
November 11/01/2024 - 11/07/2024 | 479,524 |  | $221.87 |  | 479,524 |  |  | $450.0 |
December 12/02/2024 - 12/19/2024 | 953,593 |  | $209.73 |  | 953,593 |  |  | $250.0 |
| 2,179,699 |  | $229.39 |  | 2,179,699 |  |  |

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- Definition Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-3 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 Reference 4: 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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