Joint Ventures (Details) $ in Millions |
3 Months Ended | 24 Months Ended | |
|---|---|---|---|
|
Sep. 30, 2025
USD ($)
customer
|
Jun. 30, 2025
USD ($)
customer
|
Dec. 31, 2028
USD ($)
|
|
| Lumos | |||
| Joint Venture [Line Items] | |||
| Expected investment to acquire interest in joint venture | $ 932 | ||
| Ownership interest in joint venture (percent) | 50.00% | ||
| Number of fiber customers | customer | 97,000 | ||
| Weighted average useful life | 9 years | ||
| Lumos | Forecast | |||
| Joint Venture [Line Items] | |||
| Expected investment to acquire interest in joint venture | $ 500 | ||
| Metronet | |||
| Joint Venture [Line Items] | |||
| Expected investment to acquire interest in joint venture | $ 4,600 | ||
| Ownership interest in joint venture (percent) | 50.00% | ||
| Number of fiber customers | customer | 713,000 | ||
| Weighted average useful life | 10 years | ||