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

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Estimated amount of loss resulting from an adverse tax position.

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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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Amount of interest expense accrued for an underpayment of income taxes.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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

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Income Taxes (Textuals) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
Income Taxes (Textuals) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income tax provision		$ (77)	$ 31	$ (45)	$ 82
Effective tax rate		623.60%	19.00%	(18.90%)	20.10%
Unrecognized tax benefits		$ 126		$ 126			$ 136
Interest accrued for unrecognized tax benefits		$ 8		$ 8
Assessment for tax, penalties and interest	$ 80
Scenario, Forecast
Income Tax Contingency [Line Items]
Reduction from statute of limitations						$ 4