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Summary of Significant Accounting Policies - Allowance for Doubtful Accounts Receivable (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]      
Balance at beginning of year $ 4 $ 4 $ 10
Provision 1 0 1
Recoveries 0 0 (3)
Write-offs charged against the allowance 0 0 (4)
Balance at end of year $ 5 $ 4 $ 4