Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

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-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 5D
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
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-Section S99
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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ADOPTED AND RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS (Details) $ in Millions	6 Months Ended
	Dec. 31, 2021 $ / oz	Sep. 30, 2020	Jun. 30, 2020 USD ($)
Mt. Milligan
Cash payment for each ounce of gold (in dollars per ounce) \| $ / oz	435
Minimum
Term of the contract	10 days
Maximum
Term of the contract	3 months
Peak Gold/Manh Choh
Investment fair value \| $			$ 45.7
Equity ownership interest (as a percent)		40.00%	40.00%