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Significant Accounting Policies - Summary of Trust's Investments at Fair Value (Detail) - USD ($)
$ in Thousands

Sep. 30, 2016

Sep. 30, 2015

Investment Holdings [Line Items]

Investment in Gold

$ 40,357,092

$ 24,503,318

^[1],[2]

Investment in Gold [Member]

Investment Holdings [Line Items]

Investment in Gold

40,357,092

24,503,318

^[2]

Level 1 [Member]

Investment Holdings [Line Items]

Investment in Gold

40,357,092

24,503,318

Level 1 [Member] | Investment in Gold [Member]

Investment Holdings [Line Items]

Investment in Gold

40,357,092

24,503,318

Level 2 [Member]

Investment Holdings [Line Items]

Investment in Gold

0

0

Level 2 [Member] | Investment in Gold [Member]

Investment Holdings [Line Items]

Investment in Gold

0

0

Level 3 [Member]

Investment Holdings [Line Items]

Investment in Gold

0

0

Level 3 [Member] | Investment in Gold [Member]

Investment Holdings [Line Items]

Investment in Gold

$ 0

$ 0

[1]	Effective October 1, 2014, SPDR® Gold Trust (the "Trust") adopted the financial presentation provisions for an investment company. See note 2.2 to our audited financial statements.
[2]	Represents audited schedule of investment as of September 30, 2015. Effective October 1, 2014, the Trust adopted the financial presentation provisions for an investment company. See note 2.2 to our audited financial statements.

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12.Column C.3,4)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-12C.Column C.7)
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14.Column E.2,3)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010

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-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 5
-Subparagraph (SX 210.12-13.Column C.6)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611282-123010

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