Disposal Group, Including Discontinued Operation, Consideration, Adjustment

No definition available.

Name:	alti_DisposalGroupIncludingDiscontinuedOperationConsiderationAdjustment
Namespace Prefix:	alti_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Disposal Group, Including Discontinued Operation, Consideration, Expected

+ References

No definition available.

+ Details

Name:	alti_DisposalGroupIncludingDiscontinuedOperationConsiderationExpected
Namespace Prefix:	alti_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Disposal Group, Including Discontinued Operation, Contingent Consideration

+ References

No definition available.

+ Details

Name:	alti_DisposalGroupIncludingDiscontinuedOperationContingentConsideration
Namespace Prefix:	alti_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

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

- 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

No definition available.

+ Details

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

- Definition

This element represents the cash inflow during the period from the sale of a component of the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-12

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember
Namespace Prefix:
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- Details

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Namespace Prefix:
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- Details

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- Details

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Namespace Prefix:
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- Details

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- Details

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Summary of Significant Accounting Policies - Held for Sale Accounting (Details) - Disposal group, disposed of by sale, not discontinued operations - USD ($) $ in Millions		6 Months Ended
	May 08, 2024	May 08, 2024	Mar. 06, 2024	Jan. 09, 2024	Nov. 06, 2023
Family Office Service ("FOS") \| Wealth Management
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Expected cash consideration					$ 20.1
Adjustment to cash consolidation		$ (0.6)
Cash consideration, net of adjustments	$ 19.5
LXi Reit Advisors Limited (“LRA”) \| LondonMetric Property Plc \| Strategic Alternatives \| Fund management
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration receivable			$ 33.1	$ 33.1
Contingent consideration receivable			$ 5.1	$ 5.1