Goodwill and other intangible assets - Key assumptions to fair value less costs of disposals calculation (Details) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| IHS Latam Group | ||
| Disclosure of intangible assets material to entity [line items] | ||
| Discount rate | 11.00% | 10.10% |
| Terminal growth rate | 4.40% | 4.10% |
| Tenancy growth | 6.40% | 9.80% |
| Cost of disposal | 0.50% | 0.50% |
| I-Systems [Member] | ||
| Disclosure of intangible assets material to entity [line items] | ||
| Discount rate | 10.70% | 9.60% |
| Terminal growth rate | 4.40% | 4.30% |
| Cost of disposal | 0.50% | 0.50% |
| I-Systems [Member] | Bottom of range | ||
| Disclosure of intangible assets material to entity [line items] | ||
| Homes connected | 1,000,000 | |
| I-Systems [Member] | Top of range | ||
| Disclosure of intangible assets material to entity [line items] | ||
| Homes connected | 3,100,000 | 3,600,000 |