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	3 Months Ended		6 Months Ended	12 Months Ended
Income Taxes (Textuals) (Details) - USD ($) $ in Millions	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax provision	$ 4	$ 15
Effective tax rate	10.00%	16.60%
Unrecognized tax benefits	$ 128			$ 129
Interest accrued for unrecognized tax benefits	$ 9
Assessment for tax, penalties and interest				$ 80
Scenario, Forecast
Income Tax Contingency [Line Items]
Reduction from statute of limitations			$ 4