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Organization - Additional Information (Detail)	9 Months Ended
	Jun. 30, 2014
Formation date	November 12, 2004
Minimum denomination of shares issued redeemed against gold	100,000

X

- Definition

The minimum block of shares that can be created or redeemed against gold deposits or distributions.

+ References

No definition available.

+ Details

Name:	gld_MinimumBlockOfSharesIssuedRedeemedAgainstGold
Namespace Prefix:	gld_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Trust Formation Date

+ References

No definition available.

+ Details

Name:	gld_TrustFormationDate
Namespace Prefix:	gld_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration