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Performance Bonds and Guaranty Fund Contributions (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Guarantor Obligations [Line Items]
Average Daily Clearing Settlement	$ 5,700.0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	129,661.0	$ 169,787.7	$ 137,974.3	$ 160,789.9
Margin Deposits And Guaranty Funds Liabilities Current	128,090.7		$ 135,249.2
Other non-operating income (expense)	(1,152.8)	(46.7)
Investment income	1,357.7	73.1
Total Revenues	1,441.6	1,346.6
Interest from Performance Bonds [Member]
Guarantor Obligations [Line Items]
Total Revenues	1,256.3	73.6
Expense related to Performance Bonds
Guarantor Obligations [Line Items]
Other non-operating income (expense)	1,163.5	$ 48.4
Federal Reserve Bank Advances
Guarantor Obligations [Line Items]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 117,500.0

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