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Stock-Based Compensation - Compensation Expense (Details) - Executives - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
SGI Awards |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
SGI awards | $ 58 |  | $ 58 |  | $ 73
SGI Awards | General and Administrative Expense |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based liabilities paid | 10 | $ 3 | 20 | $ 34 |
Performance based awards |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
SGI awards | 15 |  | 15 |  | $ 8
Performance based awards | General and Administrative Expense |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based liabilities paid | $ 2 | $ 1 | $ 14 | $ 5 |

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