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Investment Gains and Losses Reported in Consolidated Statements of Income (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Fixed Maturity Securities |  |  |  |  |
Gross Gains on Sales | $ 0.5 | $ 2.3 | $ 0.8 | [1] | $ 73.6
Gross Losses on Sales | (4.2) | (2.5) | (13.0) |  | (3.6)
Credit Losses | 0.0 | (1.0) | (4.1) |  | (9.3)
Mortgage Loans and Other Invested Assets |  |  |  |  |
Gross Gains on Sales | 0.0 | 1.0 | 1.4 |  | 3.5
Credit Losses | 0.4 | 0.1 | (0.1) |  | (1.6)
Embedded Derivative in Modified Coinsurance Arrangement | (0.8) | 1.7 | (4.2) |  | 18.6
All Other Derivatives | 3.7 | (0.1) | 5.5 |  | 1.6
Foreign Currency Transactions | (2.9) | (0.4) | (4.4) |  | (0.5)
Net Investment Gain (Loss) | $ (4.1) | $ 0.9 | $ (17.9) |  | $ 85.5
[1] | 1 Gross gains on sales of fixed maturity securities for the six months ended June 30, 2021 includes gains of $67.6 million as a result of the second phase of the reinsurance transaction that we completed during the first quarter of 2021. See Note 12 for further discussion.

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