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Long Term Retention Plan (Long Term Retention Program Accrued Compensation Expense) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total LTRP | $ 24 | $ 33 | $ 59 | $ 84
LTRP 2016 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total LTRP |  | 2 |  | 4
LTRP 2017 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total LTRP | 1 | 4 | (3) | 6
LTRP 2018 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total LTRP | 1 | 2 | (2) | 3
LTRP 2019 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total LTRP | 5 | 9 | 12 | 24
LTRP 2020 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total LTRP | 5 | 8 | 14 | 26
LTRP 2021 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total LTRP | 5 | $ 8 | 16 | $ 21
LTRP 2022 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total LTRP | $ 7 |  | $ 22 |

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