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Summary of Significant Accounting Policies Receivables (Details) $ in Millions | Dec. 31, 2022 USD ($) plant | Dec. 31, 2021 USD ($)
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accounts Receivable, before Allowance for Credit Loss, Current | $ 106 | $ 156
Income Taxes Receivable, Current | 4 | 1
Other Receivables, Gross, Current | 19 | 13
Allowance for Doubtful Other Receivables, Current | (1) | (1)
Receivables, net of allowance for doubtful accounts of $1 million at December 31, 2022, and 2021, respectively | $ 127 | $ 169
Number of Plants Operated | plant | 22 |

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