Revenue - Capitalized Contract Cost (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Jun. 30, 2026 |
Mar. 31, 2026 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Capitalized Contract Cost, Net [Roll Forward] | ||||||||
| Beginning balance | $ 155 | $ 160 | $ 163 | $ 143 | $ 140 | $ 139 | $ 163 | $ 139 |
| Acquisition | 0 | 17 | ||||||
| Customer contract costs deferred | 14 | 12 | 17 | 16 | 18 | 17 | ||
| Amortization of customer contract costs | (18) | (18) | (17) | (17) | (17) | (16) | (53) | (50) |
| Other | (2) | 1 | (3) | (1) | 2 | 0 | ||
| Ending balance | $ 149 | $ 155 | $ 160 | $ 158 | $ 143 | $ 140 | $ 149 | $ 158 |