v3.20.4

Related-party Transactions - Schedule of Amounts Related to Receivable and Payable Balances with Related Parties (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Related Party Transactions [Abstract] |  |
Receivables | $ 3 | $ 21
Payables | $ 7 | $ 9

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