XML 22 R6.htm IDEA: XBRL DOCUMENT v3.19.1
Consolidated Statement of Comprehensive Income Parentheticals - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Statement of Comprehensive Income [Abstract]    
Unrealized Gain (Loss) on Securities, Income Tax Expense $ 0.0 $ 0.0
Defined Benefit Pension and Other Postretirement Benefit Plans, Income Tax Expense $ 0.1 $ 0.1