Revenue from Contracts with Customers - Schedule of Contract Assets Rollforward (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Capitalized Cost To Fulfill Customer Contracts | ||||
| Change in Capitalized Contract Costs | ||||
| Balance at beginning of period | $ 309 | $ 273 | $ 450 | $ 424 |
| Additions | 467 | 440 | 1,397 | 1,267 |
| Amortization | (426) | (392) | (1,494) | (1,384) |
| Impairment | 0 | 0 | 0 | 0 |
| Foreign currency translation and other | 2 | (1) | (1) | 13 |
| Balance at end of period | 352 | 320 | 352 | 320 |
| Capitalized Cost To Obtain Customer Contracts | ||||
| Change in Capitalized Contract Costs | ||||
| Balance at beginning of period | 217 | 187 | 208 | 207 |
| Additions | 13 | 4 | 49 | 31 |
| Amortization | (15) | (1) | (42) | (54) |
| Impairment | 0 | 0 | 0 | 0 |
| Foreign currency translation and other | 0 | 0 | 0 | 6 |
| Balance at end of period | $ 215 | $ 190 | $ 215 | $ 190 |