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Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2022
Significant Accounting Policies [Abstract]  
Schedule Of Securities Segregated For Regulatory Purposes

December 31,

2022

2021

(in millions)

U.S. and foreign government securities

$

4,641

$

4,729

Municipal securities

82

-

Securities purchased under agreements to resell 1

27,058

10,392

$

31,781

$

15,121

___________________________

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

Composition Of Investment

December 31,

2022

2021

(in millions)

Equity method investments1

$

121

$

123

Investments in equity securities at adjusted cost2

16

17

Investments in equity securities at fair value2

34

49

Investments in exchange memberships and equity securities of certain exchanges2

2

3

$

173

$

192

___________________________

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

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