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CLEARING OPERATIONS - Clearing participant (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Clearing Operations
Cash Contributions	$ 1,169.2	$ 1,190.6
Non-Cash Contributions	421.5	645.9
Total Contributions	1,590.7	1,836.5
Margin deposits
Clearing Operations
Cash Contributions	600.0	319.5
Non-Cash Contributions	287.0	401.0
Total Contributions	887.0	720.5
Clearing funds
Clearing Operations
Cash Contributions	145.9	492.6
Non-Cash Contributions	41.9	69.7
Total Contributions	187.8	562.3
Interoperability funds
Clearing Operations
Cash Contributions	423.3	378.5
Non-Cash Contributions	92.6	175.2
Total Contributions	$ 515.9	$ 553.7

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