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Segment And Geographic Information (Geographic Table) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total net revenues	$ 1,937	$ 1,903	$ 1,702
Income before income taxes	1,157	1,196	1,049
United States [Member]
Segment Reporting Information [Line Items]
Total net revenues	1,524	1,501	1,393
Income before income taxes	997	1,029	947
International [Member]
Segment Reporting Information [Line Items]
Total net revenues	413	402	309
Income before income taxes	$ 160	$ 167	$ 102

X

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income after deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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