Investments Low Income Housing Tax Credits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Low Income Housing Tax Credits [Abstract]
Affordable Housing Tax Credits	$ 41.8	$ 41.8
Amortization of Affordable Housing Tax Credit Investments	(23.3)	(23.2)
Tax Benefits from Low Income Housing Investments	$ 18.5	$ 18.6