Acquisitions and Other Transactions (Divestiture of Rockies Operations) (Details) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Nov. 12, 2025 |
|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||
| Gain (Loss) on Disposition of Assets | $ (1) | $ 0 | |
| Rockies Operations | Disposal Group, Not Discontinued Operations | |||
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||
| Disposal Group, Including Discontinued Operation, Consideration | $ 980 | ||