Long-lived Assets (Intangible Assets Subject to Amortization, Net) (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Gross carrying amount | $ 2,177.2 | $ 1,914.8 |
| Accumulated amortization | (754.0) | (624.4) |
| Net carrying amount | 1,423.2 | 1,290.4 |
| Licenses | ||
| Property, Plant and Equipment [Line Items] | ||
| Gross carrying amount | 1,584.4 | 1,393.9 |
| Accumulated amortization | (406.1) | (332.7) |
| Net carrying amount | 1,178.3 | 1,061.2 |
| Customer relationships | ||
| Property, Plant and Equipment [Line Items] | ||
| Gross carrying amount | 290.8 | 255.4 |
| Accumulated amortization | (191.0) | (161.0) |
| Net carrying amount | 99.8 | 94.4 |
| Other | ||
| Property, Plant and Equipment [Line Items] | ||
| Gross carrying amount | 302.0 | 265.5 |
| Accumulated amortization | (156.9) | (130.7) |
| Net carrying amount | $ 145.1 | $ 134.8 |