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Revenue From Contracts With Customers (Tables)	12 Months Ended
	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	Year-Ended December 31 2021 2020 2019 (in millions)Geographic location 1 United States $ 951  $ 806  $ 603  International 617  481  244  $ 1,568  $ 1,287  $ 847  Major types of services Commissions $ 1,350  $ 1,112  $ 706  Market data fees 2 78  61  45  Risk exposure fees 2 38  12  16  Payments for order flow 2 40  27  21  Minimum activity fees 2 18  28  27  Other 2 44  47  32  $ 1,568  $ 1,287  $ 847  (1)Based on the location of the subsidiaries in which the revenues are recorded.‎(2)Included in other fees and services in the consolidated statements of comprehensive income.

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- Definition

Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045

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- References

No definition available.

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