Fair Value Of Financial Instruments (Schedule Of Key Valuation Inputs Used To Measure Fair Value Of Investment In Cell C) (Details) - 12 months ended Jun. 30, 2025 - Cell C [Member] R in Billions, $ in Billions |
USD ($) |
ZAR (R) |
|---|---|---|
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] | ||
| Net adjusted external debt | $ 0.5 | R 8.3 |
| Weighted Average Cost of Capital (WACC) Rate [Member] | ||
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] | ||
| Investment fair value measurement inputs | 24.00% | |
| Long Term Growth Rate [Member] | ||
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] | ||
| Investment fair value measurement inputs | 4.50% | |
| Marketability Discount [Member] | ||
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] | ||
| Investment fair value measurement inputs | 15.00% | |
| Minority Discount [Member] | ||
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] | ||
| Investment fair value measurement inputs | 17.00% |