Lease Disclosures Schedule of income from direct financing leases (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Interest income	$ 0.8	$ 1.2	$ 2.6	$ 3.9
Variable lease income	(0.0)	0.2	0.2	1.0
Total operating lease income	$ 0.8	$ 1.4	$ 2.8	$ 4.9