CLEARING OPERATIONS - Clearing participant (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Clearing Operations
Cash Contributions	$ 1,859.6	$ 1,169.2
Non-Cash Contributions	819.1	421.5
Total Contributions	2,678.7	1,590.7
Margin deposits
Clearing Operations
Cash Contributions	902.9	600.0
Non-Cash Contributions	593.7	287.0
Total Contributions	1,496.6	887.0
Clearing funds
Clearing Operations
Cash Contributions	107.5	145.9
Non-Cash Contributions	36.3	41.9
Total Contributions	143.8	187.8
Interoperability funds
Clearing Operations
Cash Contributions	849.2	423.3
Non-Cash Contributions	189.1	92.6
Total Contributions	$ 1,038.3	$ 515.9