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Investment in Gold | 12 Months Ended
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Sep. 30, 2013
Investment in Gold | 3 Investment in Gold The following represents the changes in ounces of gold and the respective values for the years ended September 30, 2013, 2012 and 2011:
(Ounces of gold are in 000’s and value of gold is in 000’s of US$) |  | Sept 30, 2013 |  |  | Sept 30, 2012 |  |  | Sept 30, 2011 |
Ounces of Gold: |  |  |  |  |  |  |  |  |  |  |  |
Opening balance |  |  | 42,803.6 |  |  |  | 39,928.9 |  |  |  | 41,813.1 |
Creations (excluding gold receivable at September 30, 2013 – 0, at September 30, 2012 – 0 and at September 30, 2011 – 0) |  |  | 4,944.8 |  |  |  | 8,225.8 |  |  |  | 11,463.0 |
Redemptions (excluding gold payable at September 30, 2013 – 115.9, at September 30, 2012 – 339.3 and at September 30, 2011 – 321.2) |  |  | (18,348.0 | ) |  |  | (5,187.1 | ) |  |  | (13,192.2 | )
Sales of gold |  |  | (156.0 | ) |  |  | (164.0 | ) |  |  | (155.0 | )
Closing balance |  |  | 29,244.4 |  |  |  | 42,803.6 |  |  |  | 39,928.9 |
Investment in Gold (lower of cost or market): |  |  |  |  |  |  |  |  |  |  |  |
Opening balance |  | $ | 50,726,261 |  |  | $ | 42,736,696 |  |  | $ | 37,736,064 |
Creations (excluding gold receivable at September 30, 2013 – $0, at September 30, 2012 – $0, and at September 30, 2011 – $0) |  |  | 7,734,465 |  |  |  | 13,956,415 |  |  |  | 17,776,506 |
Redemptions (excluding gold payable at September 30, 2013 – $ 153,680, September 30, 2012 – $602,591, and at September 30, 2011 – $520,297) |  |  | (22,459,232 | ) |  |  | (5,783,126 | ) |  |  | (12,628,298 | )
Sales of gold |  |  | (188,717 | ) |  |  | (183,724 | ) |  |  | (147,576 | )
Closing balance |  | $ | 35,812,777 |  |  | $ | 50,726,261 |  |  | $ | 42,736,696 |

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- Definition This element represents the required disclosure for investments accounted for under the cost-method. The carrying amount of such investments may be adjusted, for example, distributions in excess of cost (return of capital) or for other-than-temporary impairments. The cost method and lower-of-cost or market, an adaptation of the cost method, is generally followed for most investments in noncontrolled corporations, in some corporate joint ventures, and to a lesser extent in unconsolidated subsidiaries in which the Entity does not have the ability to exercise significant influence. + References No definition available. + Details
Name: | gld_InvestmentInGoldTextBlock
Namespace Prefix: | gld_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration