Reserves for Credit Losses (Details 2) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Jan. 01, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	$ 10.0			$ 10.0
Ending Balance		$ 22.0		22.0
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Recoveries		0.6	$ 0.5	2.0	$ 1.0
Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Increase related to adoption of CECL methodology	$ 7.0
Accounting Standards Update 2016-13 [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	$ 17.0	23.0	7.0	17.0	5.0
Provisions		4.0	4.0	16.0	10.0
Net write-offs		(5.0)	(3.0)	(11.0)	(7.0)
Ending Balance		$ 22.0	$ 8.0	$ 22.0	$ 8.0