Critical accounting estimates and judgments (Details) - USD ($) $ / shares in Units, $ in Millions |
Jun. 30, 2026 |
Mar. 31, 2026 |
Dec. 31, 2025 |
Jun. 30, 2025 |
[2] | Mar. 31, 2025 |
Dec. 31, 2024 |
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| Critical accounting estimates and assumptions [Line Items] | ||||||||||||
| Cash and cash equivalents | [1] | $ 1,073.5 | $ 825.7 | |||||||||
| Cash and cash equivalents if different from statement of financial position | 1,093.4 | [2] | $ 966.5 | 853.3 | $ 533.1 | $ 629.0 | $ 578.0 | |||||
| Cash and cash equivalents held for sale | 19.9 | 27.6 | ||||||||||
| Deferred income tax liabilities | 42.5 | 40.4 | ||||||||||
| Deferred income tax assets | $ 77.6 | $ 65.1 | ||||||||||
| MTN Group | ||||||||||||
| Critical accounting estimates and assumptions [Line Items] | ||||||||||||
| Price per share of entity's shares in merger agreement | $ 8.5 | |||||||||||
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- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of cash and cash equivalents that are classified as a part of a disposal group held for sale. [Refer: Cash and cash equivalents; Disposal groups classified as held for sale [member]] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of cash and cash equivalents in the statement of cash flows when different from the amount of cash and cash equivalents in the statement of financial position. [Refer: Cash and cash equivalents] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amounts of income taxes payable in future periods in respect of taxable temporary differences. [Refer: Temporary differences [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Not Available. No definition available.
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- Definition Price per share of entity's shares in merger agreement. No definition available.
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- Details
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