Revenue (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Revenue from Contract with Customer [Abstract] | ||||
| Percentage of total revenue (as a percent) | 1.00% | |||
| Revenue recognized that was included in the contract liability balance at the beginning of the period | $ 246 | $ 266 | $ 586 | $ 581 |
| Performance obligation satisfied in previous period | $ 30 | $ 29 | $ 57 | $ 43 |