Revenue Recognition - Schedule of Capitalized Contract Costs (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Acquisition Costs | ||
| Capitalized Contract Cost [Roll Forward] | ||
| Beginning of period balance | $ 196 | $ 203 |
| Costs incurred | 34 | 40 |
| Amortization | (31) | (33) |
| Change in contract costs held for sale | (2) | |
| End of period balance | 197 | 210 |
| Acquisition Costs | Held for sale | Mass Markets Fiber-to-the Home Business | ||
| Capitalized Contract Cost [Roll Forward] | ||
| Beginning of period balance | 24 | |
| Fulfillment Costs | ||
| Capitalized Contract Cost [Roll Forward] | ||
| Beginning of period balance | 264 | 222 |
| Costs incurred | 52 | 51 |
| Amortization | (42) | (37) |
| Change in contract costs held for sale | 0 | |
| End of period balance | 274 | $ 236 |
| Fulfillment Costs | Held for sale | Mass Markets Fiber-to-the Home Business | ||
| Capitalized Contract Cost [Roll Forward] | ||
| Beginning of period balance | $ 21 | |