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Income Taxes (Jurisdictional Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Income Taxes (Jurisdictional components of deferred taxes) |  |
Deferred Tax Assets, Gross | $ 11 | $ 15
Valuation allowances | 0 | 0
Net deferred income tax assets (liabilities) | 11 | 15
U.S. Federal [Member] |  |
Income Taxes (Jurisdictional components of deferred taxes) |  |
Operating Loss Carryforwards | 1,500 |
Deferred Tax Assets, Gross | 25 | 25
Valuation allowances | 0 | 0
Net deferred income tax assets (liabilities) | 25 | 25
State and Local Jurisdiction [Member] |  |
Income Taxes (Jurisdictional components of deferred taxes) |  |
Operating Loss Carryforwards | 600 |
Deferred Tax Assets, Gross | 1 | 1
Valuation allowances | 0 | 0
Net deferred income tax assets (liabilities) | 1 | 1
Foreign Tax Authority [Member] |  |
Income Taxes (Jurisdictional components of deferred taxes) |  |
Operating Loss Carryforwards | 34 |
Deferred Tax Assets, Gross | 15 | 11
Valuation allowances | 0 | 0
Deferred Tax Liabilities, Net | (15) | $ (11)
Share-based Payment Arrangement [Member] |  |
Income Taxes (Jurisdictional components of deferred taxes) |  |
Operating Loss Carryforwards | $ 237 |

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