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Revenue From Contracts With Customers (Tables)

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue


		Year-Ended December 31, 2019
		Electronic Brokerage			Market Making			Corporate			Total

		(in millions)
Geographic location ¹
United States		$	599		$	2		$	2		$	603
International			244			—			—			244
		$	843		$	2		$	2		$	847

Major types of services
Commissions		$	706		$	—		$	—		$	706
Market data fees ²			45			—			—			45
Risk exposure fees ²			16			—			—			16
Payments for order flow ²			21			—			—			21
Minimum activity fees ²			27			—			—			27
Other ²			28			2			2			32
		$	843		$	2		$	2		$	847

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		Year-Ended December 31, 2018
		Electronic Brokerage			Market Making			Corporate			Total

		(in millions)
Geographic location ¹
United States		$	658		$	5		$	2		$	665
International			260			—			—			260
		$	918		$	5		$	2		$	925

Major types of services
Commissions		$	777		$	—		$	—		$	777
Market data fees ²			46			—			—			46
Risk exposure fees ²			26			—			—			26
Payments for order flow ²			21			—			—			21
Minimum activity fees ²			23			—			—			23
Other ²			25			5			2			32
		$	918		$	5		$	2		$	925

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(1)Based on the location of the subsidiaries in which the revenues are recorded.
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(2)Included in other income in the consolidated statements of comprehensive income.