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INVESTMENTS - Equity Securities (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Equity Securities, FV-NI [Line Items] |  |
Fair Value | $ 990 | $ 1,091
Yen-denominated |  |
Equity Securities, FV-NI [Line Items] |  |
Fair Value | 708 | 670
Dollar-denominated |  |
Equity Securities, FV-NI [Line Items] |  |
Fair Value | 241 | 374
Other currencies |  |
Equity Securities, FV-NI [Line Items] |  |
Fair Value | $ 41 | $ 47

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