Revenue (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| 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 | $ 116 | $ 119 | $ 729 | $ 705 |
| Performance obligation satisfied in previous period | $ 15 | $ 18 | $ 75 | $ 75 |