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Schedules of Investments (Unaudited) - Investments (Details)	Sep. 30, 2017 USD ($) oz	Jun. 30, 2017 USD ($) oz	Dec. 31, 2016 USD ($) oz	Sep. 30, 2016 USD ($) oz	Jun. 30, 2016 USD ($) oz	Dec. 31, 2015 USD ($) oz
Gold bullion (Ounce) | oz	7,348,395	6,762,892	6,308,062	7,287,785	6,692,964	4,905,568
Investment in gold bullion, cost	$ 9,047,063,229	$ 8,277,677,317	$ 7,706,923,343	$ 8,897,325,981	$ 8,091,223,134	$ 5,910,175,908
Gold bullion fair value	9,428,726,089		7,311,674,849
Less Liabilities	(1,921,601)		(1,543,829)
Net Assets	$ 9,426,804,488		$ 7,310,131,020			$ 5,209,802,846

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