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Subsequent Events - Additional Information (Detail) (Subsequent Event [Member])	Aug. 08, 2014
Subsequent Event [Member]
Subsequent Event [Line Items]
Investor Ordinary fees, percentage of NAV	0.40%

X

- Definition

Investor Ordinary fees, percentage of NAV.

+ References

No definition available.

+ Details

Name:	gld_PercentageOfOrdinaryFeesOfNav
Namespace Prefix:	gld_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

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