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STATEMENT OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Statement of Comprehensive Income [Abstract] |  |  |  |
Change in Net Unrealized Gain on Securities Before Adjustment, Tax Expense (Benefit) | $ (721.3) | $ 226.9 | $ (1,496.4) | $ (207.3)
Change in Adjustment to Deferred Acquisition Costs and Reserves for Future Policy and Contract Benefits, Net of Reinsurance, Tax Expense (Benefit) | 420.5 | (165.8) | 957.4 | 166.0
Change in Net Gain on Hedges, Tax Benefit | (1.6) |  | (4.5) | 5.4
Change in Foreign Currency Translation Adjustment, Tax Expense (Benefit) | (5.3) | 0.2 | (6.1) | (1.6)
Change in Unrecognized Pension and Postretirement Benefit costs, Tax Expense | $ 2.0 | $ 1.2 | $ 2.9 | $ 2.4

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