Consolidated Statement of Comprehensive Income Parentheticals - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Consolidated Statement of Comprehensive Income Parentheticals [Abstract]
Unrealized Gain on Securities, Tax	$ 0.0	$ 0.1	$ 0.1	$ 0.1
Unrealized Gain on Derivatives, Tax	0.1	0.0	0.1	0.1
Defined Benefit Pension and Other Postretirement Benefit Plans, Tax	$ 0.2	$ 0.2	$ 0.4	$ 0.4