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Income Taxes (Details) - USD ($) $ in Millions		3 Months Ended
	Jan. 18, 2019	Mar. 31, 2019	Mar. 31, 2018
Income Tax Contingency [Line Items]
Effective income tax rate		24.00%	20.00%
Income Tax Credits and Adjustments	$ 15
Internal Revenue Service
Income Tax Contingency [Line Items]
Disallowed employment tax credits		$ 11
Interest on disallowed employment tax credits		$ 4

X

- Definition

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

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A credit or adjustment for government or taxing authority authorized decrease in taxes owed as a result of meeting certain tax policy conditions.

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The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

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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 credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.

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