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Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2022
Significant Accounting Policies [Abstract]  
Schedule Of Securities Segregated For Regulatory Purposes

June 30,

December 31,

2022

2021

(in millions)

U.S. and foreign government securities

$

7,348 

$

4,729 

Municipal securities

15 

-

Securities purchased under agreements to resell 1

23,346 

10,392 

$

30,709 

$

15,121 

________________________

(1)These balances are collateralized by U.S. government securities.

Composition Of Investment

June 30,

December 31,

2022

2021

(in millions)

Equity method investments1

$

118 

$

123 

Investments in equity securities at adjusted cost2

16 

17 

Investments in equity securities at fair value2

47 

49 

Investments in exchange memberships and equity securities of certain exchanges2

3 

3 

$

184 

$

192 

________________________

(1)The Company’s share of income or losses is included in other income in the condensed consolidated statements of comprehensive income.

(2)These investments do not qualify for the equity method of accounting and the dividends received are included in other income in the condensed consolidated statements of comprehensive income.