INVESTMENTS - Equity Securities (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Equity Securities, FV-NI [Line Items]
Total equity securities	$ 885	$ 796
Yen-denominated
Equity Securities, FV-NI [Line Items]
Total equity securities	584	484
Dollar-denominated
Equity Securities, FV-NI [Line Items]
Total equity securities	$ 301	$ 312

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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+ Details