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Revenue Contract Balances (Details) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2026 | Mar. 31, 2025 | Dec. 31, 2025 | Dec. 31, 2024
Contract assets |  | $ 17 | $ 3 | $ 15 | $ 2
Contract assets, additions/(deletions) |  | 2 | 1 |  |
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 |  | 16 | 71 | 13 | 84
Deferred revenue, revenue recognized | [1] | (6) | (18) |  |
Deferred Revenue, Additions |  | 9 | 5 |  |
Long-term deferred revenue, additions/(deletions) |  | (4) | 0 |  |
Long-term deferred revenue, revenue recognized | [1] | 0 | 0 |  |
Deferred Revenue from Contracts with Customers, Noncurrent |  | 113 | 315 | 117 | 315
Related Party [Member] |  |  |  |  |
Deferred revenue |  | 96 |  | 107 |
Deferred revenue, revenue recognized | [1] | (21) | (22) |  |
Deferred Revenue, Additions |  | 15 | 21 |  |
Deferred Revenue from Contracts with Customers, Current |  | 60 | 70 | 66 | 71
Long-term deferred revenue, additions/(deletions) |  | (3) | (3) |  |
Long-term deferred revenue, revenue recognized | [1] | 0 | 0 |  |
Deferred Revenue from Contracts with Customers, Noncurrent |  | $ 42 | $ 41 | $ 45 | $ 44
[1] | No significant revenue was recognized related to past performance obligations in the period presented.

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