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Income Taxes - Additional Information (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Jan. 18, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Contingency [Line Items]
Effective income tax rate		18.00%	16.00%	20.00%	18.00%
Increase in Unrecognized Tax Benefits		$ 1		$ 1
Amount awarded	$ 15
Internal Revenue Service
Income Tax Contingency [Line Items]
Income taxes paid		11
Interest payment		$ 4		$ 4

X

- Definition

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

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The amount of estimated penalties and interest accrued as of the balance sheet date 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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Amount awarded from other party in judgment or settlement of litigation.

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Amount of unrecognized tax benefits.

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