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Fair Value Measurements - Schedule of Embedded Derivatives (Details) - Recurring - Accrued liabilities - USD ($) $ in Millions | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Embedded derivatives |  |
Netting and Collateral | $ 0 | $ 0
Total Fair Value |  |
Embedded derivatives |  |
Embedded derivatives | 6 | 64
Level 1 |  |
Embedded derivatives |  |
Embedded derivatives | 0 | 0
Level 2 |  |
Embedded derivatives |  |
Embedded derivatives | 6 | 64
Level 3 |  |
Embedded derivatives |  |
Embedded derivatives | $ 0 | $ 0

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