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CLEARING OPERATIONS - Clearing participant (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Clearing Operations
Cash Contributions	$ 2,422.5	$ 906.3
Non-Cash Contributions	826.9	466.1
Total Contributions	3,249.4	1,372.4
Margin deposits
Clearing Operations
Cash Contributions	1,323.2	426.9
Non-Cash Contributions	547.1	338.2
Total Contributions	1,870.3	765.1
Clearing funds
Clearing Operations
Cash Contributions	105.2	103.4
Non-Cash Contributions	39.8	38.6
Total Contributions	145.0	142.0
Interoperability funds
Clearing Operations
Cash Contributions	994.1	376.0
Non-Cash Contributions	240.0	89.3
Total Contributions	$ 1,234.1	$ 465.3

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