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Income Taxes (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of income taxes differed from the federal income tax statutory rate
Income tax expense at statutory rate	$ 161	$ 45	$ 322
Increase resulting from:
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	31	8	28
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	(10)
Other, net	$ 2	$ 2	$ (4)

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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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 tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments.

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