Schedules of Investments (Unaudited) - Investments (Details)	Jun. 30, 2017 USD ($) oz	Mar. 31, 2017 USD ($) oz	Dec. 31, 2016 USD ($) oz	Jun. 30, 2016 USD ($) oz	Mar. 31, 2016 USD ($) oz	Dec. 31, 2015 USD ($) oz
Gold bullion (Ounce) | oz	6,762,892	6,425,460	6,308,062	6,692,964	5,990,515	4,905,568
Investment in gold bullion, cost	$ 8,277,677,317	$ 7,847,423,443	$ 7,706,923,343	$ 8,091,223,134	$ 7,174,407,233	$ 5,910,175,908
Gold bullion fair value	8,401,202,679		7,311,674,849
Less Liabilities	(1,723,222)		(1,543,829)
Net Assets	$ 8,399,479,457		$ 7,310,131,020			$ 5,209,802,846