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Revenue Contract Balances (Details) - USD ($) $ in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Dec. 31, 2025 | Dec. 31, 2024
Contract assets |  | $ 1 | $ 7 | $ 15 | $ 2
Contract assets, additions/(deletions) |  | (14) | 5 |  |
Contract with Customer, Asset, Reclassified to Receivable | [1] | 0 | 0 |  |
Long-term contract assets |  | 4 |  | 4 |
Contract with Customer, Asset Increase (Decrease), Noncurrent |  | 0 |  |  |
Contract With Customer Non Current Asset Reclassified To Receivable | [1] | 0 |  |  |
Liability, change in timeframe, performance obligation satisfied, revenue recognized |  | 0 | 0 |  |
Nonrelated Party [Member] |  |  |  |  |
Deferred revenue |  | 19 | 60 | 13 | 84
Deferred revenue, revenue recognized | [1] | (12) | (38) |  |
Deferred Revenue, Additions |  | 18 | 14 |  |
Long-term deferred revenue, additions/(deletions) |  | (9) | (9) |  |
Long-term deferred revenue, revenue recognized | [1] | 0 | 0 |  |
Deferred Revenue from Contracts with Customers, Noncurrent |  | 108 | 306 | 117 | 315
Related Party [Member] |  |  |  |  |
Deferred revenue |  | 101 |  | 107 |
Deferred revenue, revenue recognized | [1] | (39) | (42) |  |
Deferred Revenue, Additions |  | 41 | 42 |  |
Deferred Revenue from Contracts with Customers, Current |  | 68 | 71 | 66 | 71
Long-term deferred revenue, additions/(deletions) |  | 2 | (4) |  |
Long-term deferred revenue, revenue recognized | [1] | 0 | 0 |  |
Deferred Revenue from Contracts with Customers, Noncurrent |  | $ 47 | $ 40 | $ 45 | $ 44
[1] | No significant revenue was recognized related to past performance obligations in the period presented.

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