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Income (Parenthetical) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Net investment income (1) | $ 275.7 | $ 188.1 | $ 147.5
General and administrative expenses | 354.5 | 386.5 | 333.1
Realized and unrealized investment losses | 61.4 | 182.6 | 47.4
Asset Management Arrangement |  |  |
Net investment income (1) | 9.4 | 4.9 | 5.8
Management Consulting Agreement |  |  |
General and administrative expenses | 5.0 | 5.0 | 5.0
Apollo, Class A & B Notes |  |  |
Realized and unrealized investment losses | 8.7 | (0.4) | 0.0
Management Consulting Agreement |  |  |
Net investment income (1) | $ (19.6) | $ (3.1) | $ 0.0

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