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INVESTMENTS - Summary of Investments (Details) | Dec. 31, 2021 | Dec. 31, 2020
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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 + Details
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