Note 3 - Trust Expenses (Details Textual) - USD ($)		9 Months Ended	12 Months Ended
Jan. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Sponsors Fee Annualized Accrual Rate Based on Daily Net Asset Value		0.25%
Maximum [Member]
Legal Fees Per Year	$ 500,000		$ 100,000

Annualized sponsor's fee rate accrued daily based on the net asset value of the trust.

No definition available.

Name:	iau_SponsorsFeeAnnualizedAccrualRateBasedOnDailyNetAssetValue
Namespace Prefix:	iau_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration