XML 61 R50.htm IDEA: XBRL DOCUMENT v3.10.0.1
Net Investment Income (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Schedule of Investment Income, Reported Amounts, by Category        
Investment Income, Interest and Dividend $ 635.8 $ 632.1 $ 1,251.1 $ 1,246.9
Less Investment Expenses 8.8 8.1 18.4 16.9
Less Investment Income on PFA Assets 3.4 3.5 6.8 7.1
Net Investment Income 623.6 620.5 1,225.9 1,222.9
Fixed Maturity Securities        
Schedule of Investment Income, Reported Amounts, by Category        
Investment Income, Interest and Dividend 565.2 572.0 1,122.3 1,135.7
Derivatives        
Schedule of Investment Income, Reported Amounts, by Category        
Investment Income, Interest and Dividend 16.2 14.0 31.6 27.4
Mortgage Loans        
Schedule of Investment Income, Reported Amounts, by Category        
Investment Income, Interest and Dividend 29.1 25.6 56.4 51.0
Policy Loans        
Schedule of Investment Income, Reported Amounts, by Category        
Investment Income, Interest and Dividend 4.6 4.5 9.0 8.8
Equity Securities        
Schedule of Investment Income, Reported Amounts, by Category        
Investment Income, Interest and Dividend 0.5 [1] 0.3 [1] 0.3 0.6
Private Equity Partnerships        
Schedule of Investment Income, Reported Amounts, by Category        
Investment Income, Interest and Dividend 12.7 [2] 8.5 [2] 18.3 13.6
Other Long-term Investments        
Schedule of Investment Income, Reported Amounts, by Category        
Investment Income, Interest and Dividend 1.5 4.6 3.6 5.3
Short-term Investments        
Schedule of Investment Income, Reported Amounts, by Category        
Investment Income, Interest and Dividend $ 6.0 $ 2.6 $ 9.6 $ 4.5
[1] The net unrealized loss recognized in net investment income for the three and six months ended June 30, 2018 related to equity securities still held at June 30, 2018 was $0.3 million and $1.3 million, respectively.
[2] The net unrealized gain recognized in net investment income for the three and six months ended June 30, 2018 related to private equity partnerships still held at June 30, 2018 was $7.1 million and $5.5 million, respectively.