Note 10 - Hedging Activities (Details Textual) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2022 USD ($) GT	Dec. 31, 2021 USD ($) ozt
Derivative, Notional Amount	$ 13,952	$ 13,543
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months	53
New Investment Hedges [Member] \| Cash Flow Hedging [Member]
Derivative, Notional Amount	714	780
Leased Precious Metal Pools [Member] \| Property and Equipment, Net [Member]
Derivative Instruments in Hedges, Assets, at Fair Value, Total	223	107
Foreign Exchange Forward [Member] \| Cash Flow Hedging [Member] \| Designated as Hedging Instrument [Member]
Derivative, Notional Amount	$ 714	$ 780
Lease Precious Metals [Member] \| Cash Flow Hedging [Member] \| Designated as Hedging Instrument [Member]
Derivative, Nonmonetary Notional Amount, Mass (Gigaton)	11,417	7,559

Aggregate fair value of all derivative assets designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations.

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- Definition

Nominal mass used to calculate payments on a derivative instrument.

+ References

No definition available.

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Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

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The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994

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