XML 61 R98.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Other Comprehensive Income (Loss) And Accumulated Other Comprehensive Income - Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Net Unrealized Gains on Investments, Net of Income Taxes:    
Other Net Unrealized Gains on Investments $ 439.4 $ 119.3
Net Unrecognized Postretirement Benefit Costs, Net of Income Taxes (100.6) (94.5)
Losses on Cash Flow Hedges, Net of Income Taxes (2.7) (3.0)
Accumulated Other Comprehensive Income $ 336.1 $ 21.8