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AGREEMENTS - Schedule of Base Management Fees, Income Based Fees, and Capital Gains Incentive Fees (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Investment Company [Abstract] |  |  |
Base management fees | $ 323 | $ 305 | $ 253
Income based fees | 328 | 252 | 225
Capital gains incentive fees | $ 53 | $ (101) | $ 161

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