XML 65 R50.htm IDEA: XBRL DOCUMENT v3.25.0.1

Performance Bonds and Guaranty Fund Contributions (Cash and Securities Held as Performance Bonds and Guaranty Fund Contributions at Fair Value) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Total	$ 98,895.4	$ 90,192.5	$ 135,249.2
Cash [Member]
Performance bonds	96,036.4	87,285.5
Guaranty Fund Contributions	2,343.5	2,379.6
Cross-margin arrangements	233.1	183.1
Performance collateral for delivery	282.4	344.3
Total	98,895.4	90,192.5
Non-Cash Deposits and IEF Funds [Member]
Performance bonds	191,241.1	180,866.3
Guaranty Fund Contributions	7,977.2	6,849.6
Cross-margin arrangements	678.5	1,374.5
Performance collateral for delivery	2.1	2.1
Total	$ 199,898.9	$ 189,092.5

X

- Definition

Cross-margin arrangements

+ References

No definition available.

+ Details

Name:	cme_CrossMarginArrangements
Namespace Prefix:	cme_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Guaranty Fund Contributions

+ References

No definition available.

+ Details

Name:	cme_GuarantyFundContributions
Namespace Prefix:	cme_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Performance bonds

+ References

No definition available.

+ Details

Name:	cme_PerformanceBonds
Namespace Prefix:	cme_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Performance collateral for delivery

+ References

No definition available.

+ Details

Name:	cme_PerformanceCollateralForDelivery
Namespace Prefix:	cme_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of right to receive cash and securities on deposit with broker-dealers to demonstrate an intention to complete a purchase (good faith deposit) and collateral deposited by counterparty to cover the credit risk assumed (margin deposit).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_GoodFaithAndMarginDepositsWithBrokerDealers
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis=us-gaap_CashMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis=cme_SecuritiesAndIefFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: