Consolidated Statement of Comprehensive Income Parentheticals - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Consolidated Statement of Comprehensive Income Parentheticals [Abstract]
Unrealized Gain on Securities, Tax	$ (0.4)	$ 0.0	$ (0.3)	$ 0.1
Unrealized Gain on Derivatives, Tax	0.0	0.0	0.1	0.1
Defined Benefit Pension and Other Postretirement Benefit Plans, Tax	$ 0.3	$ 0.2	$ 0.7	$ 0.6