Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Contingency [Abstract]
Unrecognized benefit that would affect the effective tax rate	$ 1		$ 1
Amount of interest and penalties included in liabilities for uncertain tax positions	$ 1		$ 1
Effective tax rates	102.80%	(51.00%)	22.50%	(16.70%)
Income tax refund		$ 8	$ 3	$ 17
Maximum [Member]
Income Tax Contingency [Abstract]
Income tax paid	$ 1

Income Tax Contingency [Abstract]

No definition available.

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- Definition

Percentage 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 changes in the valuation allowance for deferred tax assets.

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- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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The amount of cash received during the period as refunds for the overpayment of taxes.

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- Definition

Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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