Debt (Vendor Financing Obligations Rollforward) (Details) - USD ($) $ in Millions |
9 Months Ended | |
|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Vendor Financing Obligation [Roll Forward] | ||
| Balance at January 1 | $ 8,584.8 | |
| Principal payments on operating-related vendor financing | (439.6) | $ (298.2) |
| Principal payments on capital-related vendor financing | (160.5) | (50.6) |
| Balance at September 30 | 21,771.9 | |
| Vendor Financing | ||
| Vendor Financing Obligation [Roll Forward] | ||
| Balance at January 1 | 365.9 | 355.9 |
| Operating-related vendor financing additions | 443.2 | 251.6 |
| Capital-related vendor financing additions | 160.1 | 84.7 |
| Principal payments on operating-related vendor financing | (439.6) | (298.2) |
| Principal payments on capital-related vendor financing | (160.5) | (50.6) |
| Vendor financing additions associated with the VodafoneZiggo Acquisition | 1,150.9 | 0.0 |
| Foreign currency and other | (30.2) | 47.6 |
| Balance at September 30 | $ 1,489.8 | $ 391.0 |