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Fair Value Measurements (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Liabilities: |  |
Debt, fair value | $ 9,052 | $ 9,011
Level 1 |  |
Liabilities: |  |
Debt, fair value | 0 | 0
Level 2 |  |
Liabilities: |  |
Debt, fair value | 9,052 | 9,011
Level 3 |  |
Liabilities: |  |
Debt, fair value | $ 0 | $ 0

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