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FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
United States Money Market Funds
Loss Contingencies
Deposits in domestic and foreign financial institutions, including cash investments in money market funds	$ 2,274,000,000	$ 1,544,534,000
US Treasury Securities
Loss Contingencies
Deposits in domestic and foreign financial institutions, including cash investments in money market funds	884,778,653	$ 719,884,396
SEC
Loss Contingencies
Penalty paid	1,250,000
Aggregate penalty to be paid	2,500,000
CFTC
Loss Contingencies
Penalty paid	1,250,000
Aggregate penalty to be paid	$ 2,500,000

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