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Schedule 2 - Parent Company Financial Statements - Statements of Income (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Investment Income | $ 91.3 | $ 92.0 | $ 78.4 | $ 79.2 | $ 82.6 | $ 85.9 | $ 77.1 | $ 81.6 | $ 340.9 | $ 327.2 | $ 298.3
Equity Securities, FV-NI, Gain (Loss) | (76.4) | 11.0 | 0.4 | 0.7 |  |  |  |  | (64.3) | 0.0 | 0.0
Net Realized Gains (Losses) on Sales of Investments |  |  |  |  |  |  |  |  | 26.4 | 56.5 | 33.1
Debt and Equity Securities, Realized Gain (Loss) | 16.4 | 3.6 | 3.8 | 2.6 | 11.5 | 8.1 | 26.4 | 10.5 | 26.4 | 56.5 | 33.1
Net Impairment Losses Recognized in Earnings | (2.2) | (1.8) | 0.0 | (0.5) | (3.8) | (2.9) | (2.6) | (5.0) | (4.5) | (14.3) | (32.7)
Total Revenues | 1,094.7 | 1,195.5 | 741.9 | 693.0 | 697.3 | 690.3 | 684.4 | 651.4 | 3,725.1 | 2,723.4 | 2,521.9
Interest Expense |  |  |  |  |  |  |  |  | 43.3 | 34.9 | 44.4
Total Expenses | 1,088.6 | 1,115.0 | 696.4 | 626.0 | 653.1 | 622.0 | 632.3 | 654.9 | 3,526.0 | 2,562.3 | 2,518.4
Income Tax Benefit | (1.1) | 11.8 | (8.0) | (13.4) | (8.3) | (20.5) | (15.5) | 3.1 | (10.7) | (41.2) | 9.2
Net Income | $ 6.5 | $ 92.2 | $ 37.6 | $ 53.8 | $ 36.9 | $ 47.7 | $ 36.6 | $ (0.3) | 190.1 | 120.9 | 16.8
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Investment Income |  |  |  |  |  |  |  |  | 2.5 | 3.0 | 2.0
Equity Securities, FV-NI, Gain (Loss) |  |  |  |  |  |  |  |  | 1.4 | 0.0 | 0.0
Debt and Equity Securities, Realized Gain (Loss) |  |  |  |  |  |  |  |  | (0.7) | 0.6 | 0.1
Total Revenues |  |  |  |  |  |  |  |  | 3.2 | 3.6 | 2.1
Interest Expense |  |  |  |  |  |  |  |  | 37.6 | 36.6 | 45.2
Other Operating (Benefits) Expenses |  |  |  |  |  |  |  |  | 26.3 | (5.1) | (6.1)
Total Expenses |  |  |  |  |  |  |  |  | 63.9 | 31.5 | 39.1
Loss before Income Taxes and Equity in Net Income of Subsidiaries |  |  |  |  |  |  |  |  | (60.7) | (27.9) | (37.0)
Income Tax Benefit |  |  |  |  |  |  |  |  | 12.2 | 21.2 | 13.4
Loss before Equity in Net Income of Subsidiaries |  |  |  |  |  |  |  |  | (48.5) | (6.7) | (23.6)
Equity in Net Income of Subsidiaries |  |  |  |  |  |  |  |  | 238.6 | 127.6 | 40.4
Net Income |  |  |  |  |  |  |  |  | $ 190.1 | $ 120.9 | $ 16.8

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