Joint Ventures (Details) - Forecast - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | 24 Months Ended |
|---|---|---|---|
Jun. 30, 2025 |
Dec. 31, 2025 |
Dec. 31, 2028 |
|
| Lumos | |||
| Joint Venture [Line Items] | |||
| Expected investment to acquire interest in joint venture | $ 950 | $ 500 | |
| Ownership interest in joint venture (percent) | 50.00% | ||
| Metronet | |||
| Joint Venture [Line Items] | |||
| Expected investment to acquire interest in joint venture | $ 4,900 | ||
| Ownership interest in joint venture (percent) | 50.00% |