Investments Low Income Housing Tax Credits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Low Income Housing Tax Credits [Abstract]
Affordable Housing Tax Credits	$ 1.1	$ 8.0	$ 21.6
Amortization of Affordable Housing Tax Credit Investments	(0.5)	(5.9)	(15.0)
Tax Benefits from Low Income Housing Investments	$ 0.6	$ 2.1	$ 6.6