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Revenues and Accounts Receivable - Counterparty Deficiencies (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Minimum Volume Commitments |  |
Contract liability, billed and collected | $ 138 | $ 141
Minimum Volume Commitments |  |
Minimum Volume Commitments |  |
Contract liability, billed and collected | 65 | 63
Counterparty deficiencies unbilled | 10 | 16
Counterparty deficiencies | $ 75 | $ 79

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