Provision For Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Liability for Uncertainty in Income Taxes, Noncurrent	$ 5		$ 5
Provision for income taxes	(2)	$ (8)	(7)	$ (3)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	(40)	16	(71)	27
Unrecognized Tax Benefits	13		13
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	6		6
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	2		2		$ 2
Jurisdictions where valuation allowances are maintained [Member]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest			(101)	(33)
Domestic Country And Foreign Country Witholding Taxes [Member]
Liability for Uncertainty in Income Taxes, Noncurrent	$ 3		$ 3
Deferred Tax Liabilities, Net		$ 12		$ 12

Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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