v3.25.4

Fair Value Of Financial Instruments (Narrative) (Details) R in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2025 USD ($) shares | Dec. 31, 2024 USD ($) | Dec. 31, 2025 USD ($) shares | Dec. 31, 2025 ZAR (R) shares | Dec. 31, 2024 USD ($) | Jun. 30, 2025 | Dec. 31, 2025 ZAR (R) shares
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |
Transfers into or out of Level 3 | $ |  | $ 0 |  |  | $ 0 |  |
Change in fair value | $ | $ 0 | $ 0 | $ 0 |  | $ 0 |  |
Nonrecurring [Member] |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |
Liabilities measured at fair value | $ | $ 0 |  | $ 0 |  |  |  |
Cell C [Member] |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |
Investment shares owned | shares | 75,000,000 |  | 75,000,000 |  |  |  | 75,000,000
Shares exchanged | shares |  |  | 75,000,000 | 75,000,000 |  |  |
Investment amount owned | $ | $ 0.0 |  | $ 0.0 |  |  |  |
Cell C [Member] | Marketability Discount [Member] |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |
Investment fair value measurement inputs |  |  |  |  |  | 15.00% |
Cell C [Member] | Minority Discount [Member] |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |
Investment fair value measurement inputs |  |  |  |  |  | 17.00% |
Cell C [Member] | Maximum [Member] | Listing by November 30, 2025 and Value of Shares Less Than ZAR 50 Million [Member] |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |
Sale price of shares |  |  | $ 3,000,000.0 | R 50 |  |  |
Investment amount owned | R |  |  |  |  |  |  | R 50
Cell C [Member] | Maximum [Member] | Listing Not Occur by November 30 2025 and Shares Sold [Member] |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |
Sale price of shares | R |  |  |  | R 35 |  |  |
Cell C [Member] | Class A [Member] |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |
Investment shares owned | shares | 75,000,000 |  | 75,000,000 |  |  |  | 75,000,000
Cell C [Member] | Class A [Member] | Marketability Discount [Member] |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |
Investment fair value measurement inputs |  |  | 15.00% | 15.00% |  |  |
Cell C [Member] | Class A [Member] | Minority Discount [Member] |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |
Investment fair value measurement inputs |  |  | 17.00% | 17.00% |  |  |
Cell C Listco [Member] |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |
Investment shares owned | shares | 76,590 |  | 76,590 |  |  |  | 76,590

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