Schedules of Investments (Unaudited) - Investments (Details)	Sep. 30, 2019 USD ($) oz	Jun. 30, 2019 USD ($) oz	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) oz	Sep. 30, 2018 USD ($) oz	Jun. 30, 2018 USD ($) oz	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) oz
Gold bullion (Ounce) | oz	11,011,987	9,474,090		9,009,541	8,603,326	8,637,702		7,828,465
Investment in gold bullion, cost	$ 14,230,489,101	$ 11,930,367,963		$ 11,255,129,376	$ 10,751,660,254	$ 10,806,316,895		$ 9,663,574,842
Gold bullion fair value	16,356,103,991			11,547,078,166
Less Liabilities	(3,305,611)			(2,340,020)
Net Assets	$ 16,352,798,380	$ 13,346,432,796	$ 12,556,331,670	$ 11,544,738,146	$ 10,212,197,022	$ 10,798,666,536	$ 11,548,425,460	$ 10,147,507,137