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INVESTMENTS - Summary of Investments (Details)	Dec. 31, 2021	Dec. 31, 2020
Available-for-sale securities | Minimum
Schedule of Equity Method Investments [Line Items]
Available for sale securities, percent ownership of voting stock	1.00%	19.00%
Available-for-sale securities | Maximum
Schedule of Equity Method Investments [Line Items]
Available for sale securities, percent ownership of voting stock	19.00%	25.00%
Fair value option investments | Minimum
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	10.00%	10.00%
Fair value option investments | Maximum
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	19.00%	19.00%
Other equity investments | Minimum
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	1.00%	1.00%
Other equity investments | Maximum
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	19.00%	19.00%

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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