Related Party Transaction, Cash Consideration

No definition available.

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Namespace Prefix:	gcm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 946
-SubTopic 310
-Name Accounting Standards Codification
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of operating lease expense. Excludes sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
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-Section 45
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of transactions with related party during the financial reporting period.

+ References

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-URI https://asc.fasb.org/1943274/2147483326/850-10-50-1

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_AffiliatedEntityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=gcm_GrosvenorCapitalManagementHoldingsLLLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=gcm_AircraftUtilizationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Related Parties (Details) - USD ($) $ in Millions		12 Months Ended
Related Parties (Details) - USD ($) $ in Millions	Jan. 01, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Related Party
Related Party Transaction [Line Items]
Net receivables from related parties		$ 14.5	$ 12.6
Operating lease, expense		2.8	2.6	$ 2.6
Related Party \| Affiliated Entity
Related Party Transaction [Line Items]
Net receivables from related parties		0.1	0.1
Related Party \| Affiliated Entity \| GCMH
Related Party Transaction [Line Items]
Cash consideration	$ 2.0
Affiliated Entity \| GCMH \| Aircraft Utilization
Related Party Transaction [Line Items]
Amounts of transaction		$ 3.6	$ 2.1	$ 3.4