XML 50 R20.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Organization - Additional Information (Detail) | 12 Months Ended
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Sep. 30, 2013
Minimum blocks 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