v3.26.1

Note 2 - Significant Accounting Policies - Summary of Investments at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Sep. 30, 2025
Fair Value, Inputs, Level 1 [Member]
Investment in Gold	$ 130,098,696	$ 124,430,281
Fair Value, Inputs, Level 2 [Member]
Investment in Gold	0	0
Fair Value, Inputs, Level 3 [Member]
Investment in Gold	0	0
Investment in Gold [Member] | Fair Value, Inputs, Level 1 [Member]
Investment in Gold	130,098,696	124,430,281
Investment in Gold [Member] | Fair Value, Inputs, Level 2 [Member]
Investment in Gold	0	0
Investment in Gold [Member] | Fair Value, Inputs, Level 3 [Member]
Investment in Gold	$ 0	$ 0

X

- Definition

Fair value of investment held in physical commodities, for example, but not limited to, gold, silver, platinum, crude oil, coal, sugar, rice, wheat.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-13

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

+ Details

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

X

- Details

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

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- Details

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Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=gld_InvestmentInGoldMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: