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Investments - Net Realized Capital Gains and Losses (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Major components of net realized capital gains (losses) on investments |  |  |  |
Fixed maturities, available-for-sale: Gross gains | $ 13.0 | $ 22.3 | $ 61.2 | $ 128.6
Fixed maturities, available-for-sale: Gross losses | (0.9) | (12.8) | (29.0) | (38.6)
Fixed maturities, available-for-sale: Net credit recoveries (losses) | (9.6) | (9.1) | (27.4) | (25.3)
Fixed maturities, available-for-sale: Hedging, net |  | (0.2) | (1.0) | (9.8)
Fixed maturities, trading | (4.0) | (1.5) | (28.7) | 7.2
Equity securities | 31.2 | 52.8 | 85.5 | 28.4
Mortgage loans gains (losses) | 2.6 | (0.3) | 14.2 | (15.3)
Derivative net realized capital gains (losses) | (173.7) | (42.5) | (153.9) | 52.3
Other gains (losses) | (10.6) | 56.8 | 37.4 | 42.0
Net realized capital gains (losses) | (152.0) | 65.5 | (41.7) | 169.5
Unrealized gains (losses) on fixed maturities, trading | (4.1) | (1.5) | (27.6) | 8.7
Unrealized gains (losses) on equity securities | 21.5 | 48.0 | 54.0 | 30.0
Unrealized gains (losses) on equity securities reported in net investment income | 3.7 | 2.7 | 9.6 | 13.2
Proceeds from sales of investments |  |  |  |
Proceeds from sales of investments in fixed maturities, available-for-sale | $ 273.6 | $ 628.6 | $ 1,870.7 | $ 2,176.2

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- Definition Amount of gain (loss) included in earnings on loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio. + References No definition available. + Details
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