| **Income Taxes (Details) - USD ($) $ in Millions**        | 3 Months Ended | 6 Months Ended |
|-----------------------------------------------------------|----------------|----------------|
||
| **Income Tax Disclosure [Abstract]**                      |           |           |   |   |
| State and local income taxes, net of federal tax benefits | $ (2)          | $ (2)          | $ (1) | $ (5) |
| Changes in valuation allowance                            | 4              | (2)            | 3 | (1) |
| Nondeductible expenses                                    | 6              | 0              | 6 | 0 |
| Noncontrolling interest                                   | $ (2)          | $ (2)          | $ (3) | $ (1) |

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| - Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.
+ References
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| - Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to noncontrolling interest income (loss) exempt from income taxes.
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| - Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses.
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| - Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit).
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